A ball is droped from a high rise platfo...

A ball is droped from a high rise platform `t = 0` starting from rest. After `6 s` another ball is thrown downwards from the same platform with a speed `v`. The two balls meet at `t = 18 s`. What is the value of `v` ?

A

60 m/s

B

75 m/s

C

55 m/s

D

40 m/s

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The correct Answer is:

C

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