Question

a boy of 90cm is walking away from the base of lamp post at a speed of 1.2 metre per second.if the lamp post is 3.6m above the ground.find the length of the shadow after 4sec​

Answer 1

Answer:

dist travel by boy=1.2x4,=4.8meter

hight of lamp post=3.6meter

length of shadow after 4 sec=4.8meter+90cm=5.7meter