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Question

A room 9.5m long and 6m wide is surrounded by a 1.25m wide verandah. Calculate the cost of cementing the floor of this verandah at Rs.80 per m2.

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Solution

Let EFGH be the room and the shaded area be the area of the verandah.

Now,

Length of the rectangle ABCD including the verandah DC=HG+2×1.25=12m

Breadth of the rectangle ABCD including the verandah BC=FG+2×1.25=8.5m

Therefore, area of the verandah = Area of ABCD Area of EFGH

=12×8.59.5×6

=10257

=45m2

Cost of cementing the floor =45×80=Rs.3600


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