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.
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
=12×8.5−9.5×6
=102−57
=45m2
Cost of cementing the floor =45×80=Rs.3600