Question

A boy of height 1.75m is walking away from the base of a lamp post at a speed of 1.2m/s . If the lamp is 7m above the ground , then find the lenght of the shadow after 5sec.!!!!!! plz guys tell

Answer 1

just change the value method is like this

Answer 2

 BC=1.2*5=6 m
angle D= angle D (COMMON)
angle B=angle C =90
AB/EC=BD/CD
7/1.75=x+6/x
700/175=x+6/x
            4=x+6/x
            4x=x+6
           4x-x=6
               3x=6
                 x=6/3
                 x=2 m 
length of her shadow is 2 m
PLEAS MARK AS BRAINLIEST!!!!!!!!!