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A ball is dropped from the top of a buil...

A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of `40ms^(-1)` from the bottom of the building. The two balls will meet after.

A

3 s

B

2 s

C

2.5 s

D

5 s

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The correct Answer is:
C
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