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A ladder, 5m long, standing on a horizon...

A ladder, `5``m` long, standing on a horizontal floor, leans against a vertical wall. If the top of the ladder slides down wards at the rate of `10 cm`/`sec`, then find the rate at which the angle between the floor and ladder is decreasing when lower end of ladder is `2` `m` from the wall.

A

`1/10` rad/s

B

`1/20` rad/s

C

20 rad/s

D

10 rad/s

Text Solution

Verified by Experts

The correct Answer is:
B
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