EXERCISE 3.3
Gregory plans to build a wall around a rectangular plot of land. Length of the
land is 40 m and breadth is 30 m. Find the distance around the plot.
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Length and breadth of the plot of land is 45 m and 30 m.
A wall of height 2.4 m is built all around the plot at a distance
of 1 m from the plot.
∴ The dimensions of wall is (45+2) and (30+2) m
∴ Total surface area of the wall =2×[(47×2.4)+(32×2.4)]
=2×(112.8+76.8)
=379.2m2
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