Question

The length of a rectangle is four times its width. If the area is 100 m2 what is the length of the rectangle?
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Answer 1

Answer:

The area of the rectangle = length × breadth

Letting the width = x m

Then, length = 4x m

A = l × b = 100 m²

4x × x = 100 m²

x² = 100/4 m²; then removing the squares

x = 10/2 m

x = 5 m = width

Length = 20 m

Answer 2

$\huge\mathtt\red{Solution:}$

width=x

lenght = 4x

area=l×b

100=4x × x

100=4x square

100÷4= x²

25=x²

$\sqrt{5 } = {x }^{2}$

x= 5

Width = 5m

Length = 20m