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Sargah Surya from bgsnps, Bengaluru
Subject :NSO    Class : Class 6

Sachin being tested for his eyesight by an optician, sits 3 m in front of a plane mirror and looks at the image of the chart of letters, which seems to be 7m in front of him. Where exactly is the chart of letters located?

A1 m behind him
B4 m behind him
C3 m behind him
D7 m behind him


how

Ans 1:

Prathamesh Raje from DPS Electronic City, Bangalore
Class : Class 9

Ans 2:

Rahil from Delhi Public School Faridabad, Faridabad
Class : Class 7
A as image is as far behind the mirror as Object is in front of it. In this case Sachin is 3 m in front of the mirror and the object seems to be seven meters ahead. As Sachin is 3 m in front of the mirror that means object is (7-3) = 4 m behind the mirror. As image is as far behind the mirror as Object is in front of it, It means chart is 4 meters in front of the mirror. ( 4 - 3 ) = 1 m behind Sachin as Sachin is also in front of the mirror. Hope that answers your question !

Ans 3:

Pragyan Srivastava from Manipal Public School, Lucknow
Class : Class 10
A

Ans 4:

Shriya Sreekrishna from BLUEBELLS SCHOOL INTERNATIONAL, New Delhi
Class : Class 7

Ans 5:

Bhavtosh Tripathi from Maneckji Cooper Education Trust School, Mumbai
Class : Class 9

Ans 6:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Ans 7:

arnav from Dps noida, Delhi
Class : Class 8
a

Ans 8:

Nandan Makineni from VIBGYOR HIGH, Bangalore
Class : Class 6

Ans 9:

ttraj from KV IIT, Chennai, Chennai
Class : Class 3
A

Ans 10:

Admin fly from Ddssxxx, Ax
Class : Class 1

Ans 11:

Ishir Jha from Gyan Ganga Global Academy, Rosera
Class : Class 8

Ans 12:

Aarohi Srihari Torgal from V.V.S B.M Sri Educational Institutions , Mysure
Class : Class 6
A

Ans 13:

Vasu tyagi from St Joseph's High school, Panvel
Class : Class 6
Sachin is being tested for his eyesight by an optician.Now, let’s read the given information carefully, and find out the position of Sachin.Sachin sits 3 m in front of a plane mirror, and looks at the image of the chart of letters, which seems to be 7 m in front of him.This means the distance between the mirror and the image of the chart is (7 m – 3 m = 4 m). If the image of the chart is 4 m behind the mirror, then the actual chart is placed 4 m in front of mirror.Now the chart is placed 4 m in front of the mirror, and Sachin is sitting 3 m in front of the mirror. That means the chart is placed (4 m – 3 m = 1 m) behind Sachin. Hence, the right answer is Option A.

Ans 14:

Admin fly from Ddssxxx, Ax
Class : Class 1
A

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