question_answer

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

A)  1.2 m              

B)  1.6 m

C)  1.9 m              

D)  2.2 m

E)  None of these