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A stone is dropped from the top of a tow...

A stone is dropped from the top of a tower. When it crosses a point 5 m below the top, another stone is let fall from a point 25 m below the top. Both stones reach the bottom of the tower simultaneously. Find the height of the tower. Take `g = 10 m//s^2.`

A

`45m`

B

`50m`

C

`60m`

D

`65m`

Text Solution

Verified by Experts

The correct Answer is:
A
Vel. Of 1st stone when passing at `A rarr`
`V^(2)=0+2.10.5`
`S_(1)-S_(2)=20m.`
`rArr(10.t+(1)/(2)10.t^(2))-((1)/(2).10.t^(2))=20`

`t=2s`
`S_(2)=(1)/(2).10.4=20m`
`Ht=25+20=45m.`
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