Mensuration Practice Test 5

Question : 23 of 40

Marks: +1, -0

Find the area of a rectangle whose length is 5 times its width and its perimeter is 144 cm.

Solution:

Perimeter of a rectangle = 2(l + b)
144 = 2(5b +b)
144 = 12 b
b = 12 cm
then length = 60 cm
Area = l × b = 60 × 12 = 720

cm^2

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