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keosha jain from saint francis convent intercollege , jhansi
Subject :NSO    Class : Class 8

Ans 1:

Archisman Biswas from Santipur Municipal High School, Nadia
Class : Class 9
In the explanation it is given that option b is wrong. Then how does the OPTION B become the right one ?

Ans 2:

Akhil Budithi from Kennedy high the global school , Hyderabad
Class : Class 8

Ans 3:

Akshara from NPS, Bengaluru
Class : Class 8
Completely agree. ????

Ans 4:

Akshara from NPS, Bengaluru
Class : Class 8

Ans 5:

Avyukth Radhakrishnan from TSRS, Gurgaon
Class : Class 10
why does it say b is wrong(and c is correct) in the solution and that b is the correct answer?Isn't it C?

Ans 6:

Anusha from LBS School , Kota
Class : Class 10

Ans 7:

ANUSHKA SHARMA from CAMBRIDGE COURT WORLD SCHOOL, JAIPUR
Class : Class 8

Ans 8:

Naivedya Moondra from Lake Montfort, BANGALORE
Class : Class 8
Yes. Why does it say that?

Ans 9:

Saksham Chanani from Sri Sri Academy, Kolkata
Class : Class 9
it says that b is correct and then in soln. it says b is wrong

Ans 10:

Palchin from Naval public school, Uran
Class : Class 8
in the solution it says that option b is wrong then it says that that the correct option is option b please explain

Ans 11:

Saransh Sharma from St. Anselm's English medium School, Sawai Madhopur
Class : Class 8
In solution it is written B is incorrect then HOW THE OPTION 'B' IS COREECT????

Ans 12:

Genius Sahaji from BTS Bhopal, BHOPAL
Class : Class 8
me too its written wrong and they are ignoring the reviews and comments and errors

Ans 13:

SANVI from D PS VADODARA, Vadodara
Class : Class 9

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Aditya Arsh from Virendra Swarup Public School Cantt, Kanpur
Subject :NSO    Class : Class 8

Ans 1:

Lakshmi from DDPS, Kota
Class : Class 8
speed =frequency*wavelength so frequency is inversely proportional to wavelength so if frequency changes the wavelength will also change

Ans 2:

neelu desai from bombay scottish, mumbai
Class : Class 8
both 1 and 3 should be answers

Ans 3:

Lakshya Ajay Kawade from Holy Cross Kapa , Raipur
Class : Class 10
It should be option c

Ans 4:

Archi from Mothers Global School, Delhi
Class : Class 10

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD
Class : Class 3
B

Ans 2:

Santina Suzanne from owis, bangalore
Class : Class 4
it should be c or d but it tells b

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

Hamsini from yagappa international school, Thanjavur
Class : Class 6
D

Ans 2:

Nadar Toor from strawberry fields high school, chandigarh
Class : Class 3
d

Ans 3:

Avighna Shastri from doha modern indian school, doha
Class : Class 2
d!!!!!!!!!!!!!!!!!!!!!!!!!!!!!👍🏼

Ans 4:

Hamsini from yagappa international school, Thanjavur
Class : Class 6
d

Ans 5:

Advay Agarwal from Bal Bharati Public School , PITAMPURA
Class : Class 4
so answer is b

Ans 6:

Ram Prasanna from Basil Woods International, Hyderabad
Class : Class 3
B

Ans 7:

Prasanna Hegde from Vibgyor High Horomavu, BENGALURU
Class : Class 5
D

Ans 8:

Nirvi Pal from jasudben ML School, mumbai
Class : Class 5
correct answer is d okkkkkkkkkkkkkkkkkkk

Ans 9:

Advay Agarwal from Bal Bharati Public School , PITAMPURA
Class : Class 4
handspan and footspan are a unit measuring ok

Ans 10:

IKSHITA BARMAN from MVM-IV, Barsajai, GUWAHATI
Class : Class 9
D

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Priyangshu Chattopadhyay from ST AGNES SCHOOL KHARAGPUR, Kharagpur
Subject :NSO    Class : Class 6

Ans 1:

AKSHAT AGRAWAL from NPS, BANGALORE
Class : Class 7

Ans 2:

AKSHAT AGRAWAL from NPS, BANGALORE
Class : Class 7

Ans 3:

EKLAVYA GONDULE from DPS BHILAI, Bhilai
Class : Class 7

Ans 4:

Aarav Srivastav from DWPS , Noida Extension
Class : Class 7

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

Ans 1:

Vighnesh from DYPIS, Navi Mumbai
Class : Class 3

Ans 2:

S Malhotra from SFS , New Delhi
Class : Class 5

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Bidyashree Panda from Royal Concord International School Begur, Bangalore
Subject :NSO    Class : Class 4

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Rudra from VSPK international school sec -13 Rohini Delhi, Delhi
Subject :NSO    Class : Class 8

Ans 1:

Avanish Pandey from St Francis school , Bilaspur
Class : Class 9

Ans 2:

Avanish Pandey from St Francis school , Bilaspur
Class : Class 9
The correct answer will be(a)

Ans 3:

Aniket Kumar from Gyan Niketan, Patna
Class : Class 8

Ans 4:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7
what does NA mean?

Ans 5:

Ruchi Sinha from DPS Gurgaon , Gurgaon
Class : Class 8
NA? what is the explanation of the answer

Ans 6:

Naveen Kumar from Gail DAV Public School, Dibiyapur
Class : Class 8
PLEASE GIVE THE ANSWER ALONG WITH EXPLANTION

Ans 7:

AANYA BARANWAL from KPS SCHOOL, bhilai
Class : Class 5
NA means no answer but what we had to do with it

Ans 8:

HELEN ELDHO from MAR ATHANASIUS, KOOVAPPADY
Class : Class 9
why no reply...

Ans 9:

Akshara from NPS, Bengaluru
Class : Class 8
Yes , NA means 'no answer' So , since there is no such option , anything we pick would be incorrect.

Ans 10:

Akshara from NPS, Bengaluru
Class : Class 8
Arrows are marked wrongly...I dont think these mistakes will ever get rectified considering that people have been writing in this forum, for the past two years, for this question. please look into this sof🙂

Ans 11:

Karthik Rao Varam from Bala Vidya Mandir, Chennai
Class : Class 10

Ans 12:

Het Aryan from Podar International School , Pune
Class : Class 9
What the heck is going on.

Ans 13:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7
if there is no answer,then why was it considered wrong?it is not fair.

Ans 14:

Suvan Shee from Chirec public school, Hyderabad
Class : Class 9
"NA"?.please explain the answer

Ans 15:

Ashvik Banerjee from Mount Litera Zee School , Vasco
Class : Class 9
What 'NA' ? The question itself is incorrect

Ans 16:

SUHANI PANDA from DE PAUL SCHOOL, BERHAMPUR
Class : Class 8
What do you mean by 'NA'?

Ans 17:

Mridul Vashisht from St. Kabir Public School, Chandigarh
Class : Class 8
Woah how are the marks out of 60 then. People have already attempted this paper in the given year. This means an error in the paper was there that wasn't rectified...

Ans 18:

Ruchi Sinha from DPS Gurgaon , Gurgaon
Class : Class 8

Ans 19:

Abhijit from saint raphael h.s. school, indore
Class : Class 6

Ans 20:

Anshuman D from MVM, Hyderabad
Class : Class 9
I understood that when I looked at the question itselfThe arrows are wrongly labelled

Ans 21:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7

Ans 22:

Tay Wen Xuan from Inspiros International School, SHAH ALAM
Class : Class 9
Please explain what NA is... I don't understand

Ans 23:

Nipun Abhilash from National Public School, Banashankhari, Bangalore
Class : Class 9

Ans 24:

Akshara from NPS, Bengaluru
Class : Class 8
Exactly.What does NA mean ??

Ans 25:

Mani Gupta from Carmel Convent School, Faridabad
Class : Class 9
Please explain the answer

Ans 26:

Avyukth Radhakrishnan from TSRS, Gurgaon
Class : Class 10
NA means 'No Answer'.But the guidelines clearly state 'Mark all questions.'How is this fair?

Ans 27:

Saanvi from Dehli Public School , Gurugram
Class : Class 4

Ans 28:

Karthik Rao Varam from Bala Vidya Mandir, Chennai
Class : Class 10

Ans 29:

Jayadeep Shanmugam from Sri Sri Ravishankar Vidya Mandir, Bangalore
Class : Class 8
Please give the answer to this Question.

Ans 30:

Ankit kumar Jha from Ryan International School , Ghaziabad
Class : Class 9
NA meant no answer is correct and we had to leave this one empty

Ans 31:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore
Class : Class 9
EXPLAIN THIS PLEASEQuestion is incorrect but even after 30 (31) posts and queries no corrections...

Ans 32:

AKSHAJ SRIVASTAVA from MOUNT LITERA ZEE SCHOOL, Kanpur
Class : Class 9
None of the given options are correct...

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 3

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Abhay Agarwal from St Francis School, Ghaziabad
Subject :NSO    Class : Class 8

Ans 1:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9
please explain this question

Ans 2:

Kabir Kaushik from Elpro International School, Pune
Class : Class 8
Yes I think it is 33 also because it says it is an echo

Ans 3:

Bhramana Roy from Glendale Academy International, Hyderabad
Class : Class 8
Time taken to utter single syllable=1/5th of a sSpeed of sound in air=330m s^-1 or 330m/sso distance to reflecting surface=1/5 * 330 as that will give the distance=66.0mSo, distance to reflecting surface is 66.0m

Ans 4:

Amol Athawale from WoodRidge High, aurangabad
Class : Class 7
answer??????????????????????????????????????????????????????

Ans 5:

Akhil Budithi from Kennedy high the global school , Hyderabad
Class : Class 8
please explain this question.

Ans 6:

vatsal jay gandhi from new era senior secondary school, Vadodara
Class : Class 8
please explain this question.

Ans 7:

Ansuman Mohanty from O.D.M.Plubic School, Bhubaneswar
Class : Class 9

Ans 8:

Darsh Singh from DAV, Talcher
Class : Class 8
Yes, it should be 33m as distance for an echo = s x t/2

Ans 9:

Nilanjana De from Delhi Public School North, Bengaluru
Class : Class 8
Can someone please explain this question?

Ans 10:

Prisha Hemchandra Lokhande from NPS Whitefield, Bangalore, Bangalore
Class : Class 8
Is the question wrong...? the answer should be 33.0 m as speed=2d/t

Ans 11:

Abhay Agarwal from St Francis School, Ghaziabad
Class : Class 9

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