A rectangular field 90 m
long and 70 m wide has a 3 m wide path
inside along the sides of the field. Find
the area of the path and the cost of its
construction at the rate of 20 per 10 m
.
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Explanation :- dimensions for path
l = 90 m + 3m = 93m
b = 70m + 3m = 73m
Area of path = l × b
= 93m × 73m
= 6789 m²
cost of 10m² = Rs 20
cost of 1 m² = Rs 20 ÷ 10
= Rs 2
cost of 6789m² = Rs 2 × 6789
= Rs 13578
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