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In the diagram, the shaded part is carpet laid in a room with dimensions 3.5m by...


Question

In the diagram, the shaded part is carpet laid in a room with dimensions 3.5m by 2.2m leaving a margin of 0.5m round it. Find area of the margin.

Options

A) 4.7m2

B) 4.9m2

C) 5.7m2

D) 5.9m2

The correct answer is A.

Explanation:

Area of floor = 3.5m x 2.2m = 7.7m2

Area of carpet = (3.5 - 0.5 - 0.5)m x (2.2 - 0.5 - 0.5)m

2.5m x 1.2m = 3m2

hence, area of margine

= area of floor - area of carpet

= (7.7 - 3)m2

= 4.7m2


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Dicussion (1)

  • Area of floor = 3.5m x 2.2m = 7.7m2

    Area of carpet = (3.5 - 0.5 - 0.5)m x (2.2 - 0.5 - 0.5)m

    2.5m x 1.2m = 3m2

    hence, area of margine

    = area of floor - area of carpet

    = (7.7 - 3)m2

    = 4.7m2

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