Question
A rectangular hall is 12 m long and 9 m wide. A carpet
is laid leaving a uniform border of 1 m all around the inside. Find the area of the border.Solution
Outer area = 12 Ć 9 = 108 mĀ² Inner length = 12 ā 2Ć1 = 10 m Inner width = 9 ā 2Ć1 = 7 m Inner area = 10 Ć 7 = 70 mĀ² Area of border = 108 ā 70 = 38 mĀ² Answer: 38 mĀ²
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