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(i) the area covered by the roads.
(ii)the cost of constructing the roads at the rate of Rs 110 per m2.
Length (l) of field = 90 m
Breadth (b) of field = 60 m
Area of field = 90 × 60 = 5400 m2
Length of road PQRS = 90 m
Length of road ABCD = 60 m
Width of each road = 3 m
Area of the roads = ar (PQRS) + ar (ABCD) − ar (KLMN)
= (90 × 3) + (60 × 3) − (3 × 3)
= 270 + 180 − 9 = 441 m2
Cost for constructing 1 m2 road = Rs 110
Cost for constructing 441 m2 road = 110 × 441 = Rs 48510
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