Ans 2:
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Ans 1:
Class : Class 10
This equation is formed like that:
Let present age =x
Twenty years ago=x-20
A.T.C
x-20 = 1/3 ×x
-20 =1/3x-x
-20 = -2/3x
20÷2/3 =30 years
Age after 15 years =30+15 =45 years
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Ans 1:
Class : Class 7
according to me, the ans should be 3 litres. as 1.5 L * 3 = 4.5 L which is the amount used in 3 days(Tue, Wed n Thurs) hence, 7.5 L- 4.5 L=3 LITRES.That, according to me, is the answer
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Ans 1:
Class : Class 9
d = 75% of old d .....
=> r = 75 %of old r.....
volume of sphere =4/3 *pi*r*r*r......
new= 4/3*pi*r*r*r*27/64.....
4/3*pi*r*r*r will cancel out.....
volume(new) =27/64 of old, decreased by 37/64, % =37/64*100=3700/64=37*25/16 = 57.81....
therefore answer is opt (D) .....hope you understood!!!!!
of my present age. What will be my age after fifteen years?
of oil on Monday. She used
of oil everyday. How much oil is left with her after Thursday?