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/sec. If the lamp is 3.6 m above the ground, find the length of her shadow after 4 sec.

A)  8 m                             

B)  4.8 m

C)  2.8 m              

D)  1.6 m

E)  None of these