Area and Perimeter Practice Test 2

Question : 17 of 40

Marks: +1, -0

A typist uses a sheet measuring 20 cm by 30 cm lengthwise. If a margin of 2 cm is left on each side and a 3 cm margin on top and bottom. What is the per cent of the page used for typing?

Validate

Solution:

Area of whole sheet = 30 × 20 = 600

cm^2

Area of sheet used = (30 – 2 × 3) × (20 – 2 × 2)
= 24 × 16 = 384

cm^2

Hence, required percentage =

{384}/{600} × 100

= 64 %

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