Question

In this rectangle, the length and the width are in the ratio 5 : 2. The area of the rectangle is 90 cm². Work out the length and width of the rectangle.

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Answer 1

Answer: width: 6cm

length: 15 cm

Explanation:

w=2b

A=90 cm^2

A=l*w

A=5b*2b

A=2.5w*w

A=2.5w^2

90=2.5w^2

w^2=36

w=6 cm

90=l*6

l=15 cm