A 5 ft long man walks away from the foot of a `12 1/2` ft high lamp post at the rate of 3 mile/h. Find the rate at which his shadow is increasing.

A 5 ft long walks away from the foot of a 12(1)/(2)ft high lamp-post at the rate of 3 mi/h. find the rate at which his shadow is increasing.

A 5(1)/(2) ft long man walks away from the foot of a 12(1)/(2) ft high lamp-post at the rate of 5(1)/(11) miles/h, the rate at, which his shadow is increasing , is k miles/h, find k .

A man 6 ft tall walks away from the foot of a lamp-post 15 ft high at the rate of 3 mi/h how fast does the tip of his shadow move?

A man 6 ft tall walks away from the foot of a lamp-post 15 ft high at the rate of 3 mi/h How fast does his shadow lengthen?

A light is placed on the groung at a distance of 30 ft from a house. A man 6 ft tall walks from the light towards the house at the rate of 5 ft/s find the rate at which his shadow on the wall is shortening when he is 15 ft from the wall.

A man of height 2 metres walks at a uniform speed of 5 km/h away from a lamp post which is 6 metres high. Find the rate at which the length of his shadow increases.

A man is moving away from a tower 41.6 m high at the rate of 2 m/sec. Find the rate at which the angle of elevation of the top of tower is changing, when he is at a distance of 30m from the foot of the tower. Assume that the eye level of the man is 1.6m from the ground.

A ladder 26 ft long leans against a vertical wall. If the top slides downwards at the rate of 10 in/s. find the rate at which the lower end moves on a horizontal floor when it is 10 ft from the wall. Find also the rate at which the slope of the ladder changes.

A circular disc of radius 3 cm is being heated. Due to expansion, its radius increases at the rate of 0.05 cm/s. Find the rate at which its area is increasing when radius is 3.2 cm.

A ladder 20 ft long leans against a vertical wall. If the top end slides downward at the rate of 2 ft/s, find the rate at which the lower end moves on a horizontal floor when it is 12 ft from the wll. Find also the rate at which the slope of the ladder changes.