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Question

Two balls A and B are simultaneously thrown. A is thrown from the ground level with a velocity of 20 ms−1 in the upward direction and B is thrown from a height of 40 m in the downward direction with the same velocity. Where will the two balls meet?

A
15 m
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B
25 m
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C
35 m
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D
45 m
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Solution

The correct option is B 15 m
Let both the ball meet after timet and x be the distance covered by ball A.
So, x=20t12(10)t2...(1)
For ball B,(40x)=20t+12(10)t2...(2)
Adding (1) & (2),40=40tort=1 s
so x=205=15 m

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