A ladder 5m long is leaning against a wall. The foot of the ladder is pulled out along the
Channel: Doubtnut
Date: 2020-01-28

A ladder 5m long is leaning against a wall. The foot of the ladder is pulled out along the ground away from from the wall at a rate of `2 m//s`. How fast is the height of ladder on the decreasing at the instant when the foot of the ladder is `4 m` away from the wall?