A man of height 1.6m, walks at a rate of 30m/sec away from a lamp which is 4m in height. How fast the shadow of man is lengthening.

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 2m tall, walks at the rate of 1 2/3m//s e c towards a street light which is 5 1/3 m above the ground. At what rate is tip of his shadow moving? At what rate is the length of the shadow changing when he is 3 1/(13)m from the base of the light?

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?

Time taken by man of weight 580 N to climb up to the top of a towar 80 m high was 4min . What was the power of the man ?

A girl of height 90cm is walking away from the foot of a lamp-post at a speed of 1.2m//sec . If the lamp is at a height of 3.6m from the ground, then the length of the shadow of the girl after 4 sec is

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 lamp is 50 ft above the ground. A ball is dropped from the same height from a point 30 ft away from the light pole. If ball falls a distance s=16 t^2 ft in t second, then how fast is the shadow of the ball moving along the ground 1/2 s later?

A girl of height 90 cm is walking away from the base of a lamp post at a speed of 1.2 m/sec. If the lamp post is 3.6m above the ground, find the length of her shadow after 4 seconds.

A 1.5m tall boy stands at a distance of 3m from a lamp post and casts a shadow of 4.5m on the ground. Find the height of the lamp.

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.