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

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
  • A.
    4.7m2
  • B.
    4.9m2
  • C.
    5.7m2
  • D.
    5.9m2
Correct Answer: Option 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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