Question

a school flag pole which is 69m high casts a shadow of 3.2m at about 11am the shadow cast by the school lower at the same time is 18m long. Calculate the height of the tower

Answer 1

Given that the time is the same we will also assume that the magnification is the same.

The formula to obtain this is :

Image height of the pole / height of the pole  = Image height of the tower/ height of the tower

Let the height of the tower be h .

Doing the substitution we have :

3.2/69 = 18/h

we need h.

3.2h = 1242

h = 1242/3.2 = 388.125 m

= 388.125m

Answer 2

Answer:

circumference =3 area

2πr = 3π r^2

2r = 3r^2

2= 3r

3/2= r