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Question

A door of length 2 metre and breadth 1.5 m is on a wall the length of the wall is 4.5 M and breadth is 3.6 M find the cost of whitewashing the wall at the rate of 20 rupees per metre square

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Solution

Dear student,
Area of door=l×b=2×1.5=3 m2Area of wall with door=L×B=4.5×3.6=16.2 m2Area of wall without door=Area of wall with door-Area of door=16.2-3=13.2 m2Cost of white washing the wall=13.2×20=Rs 264
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