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Drops of water fall at refular intervais...

Drops of water fall at refular intervais from the roof of a building of height H = 5 m, the first drop strikes the ground at the same moment when the fifth drop detaches itself from the roof. Then ratio of distances first drop reaches the ground are :

A

`1: 5:7:3`

B

`1:3:5:7`

C

`1:3:7:5`

D

`1:2:3:4`

Text Solution

Verified by Experts

The correct Answer is:
B
Drops of water …………
By the time `5^(th)` drop starts falling, the first drop reaches to the ground
`t = sqrt(2xx5)/(10) = 1 sec`
Hence the interval of falling of each drop
`= (1)/(4)sec = 0.25 sec`
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