Question

At a certain time a tree 6 m high casts a shadow of length 8 m At the same time a pole casts a shadow of length 20 metres find the hight of the pole

Answer 1

Step-by-step explanation:

this is direct proportion.

6 is k8

so k is 6/8 which is 3/4.

let height of pole be x

so x is k20

so x is 3/4*20

which is 15

Answer 2

Answer:

15M

Step-by-step explanation:

WE KNOW THAT , THE RATIO OF POLE HEIGHT AND ITS SHADOW IS EQUAL TO RATIO OF TREE AND ITS SHADOW AT SAME TIME.

THEN , LET THE HEIGHT OF POLE = X m

SO,   6 / 8 = X / 20

        X =  6 x 20 / 8 = 15 m