Question

A classroom floor is 20 metres wide.

If the total area of the floor is 300 square metres, how long is it?

Answer 1

It is 15 m long.

Explanation:

Given

width (b) = 20 m

Area of the floor (A) = 300 m^2

Length (L) = ?

we know

A = L * b

300 = L * 20

L = 15 m

Hope it will help :)