17. A rectangular piece of land measures 0.8 km by 0.6 km. Each side is to be fenced with
three rows of wire. Find the length of the wire needed. If the cost of fencing is 150 per
metre, find the total cost of fencing the land.
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Step-by-step explanation:
perimeter of the land is 2 x 1.4 km = 2.8 km
3 rows = 3 x perimeter = 2.8 x 3 = 8.4 km wire is needed
length of wire in m = 8400 m
total cost per metre = ₹150
total cost for 8400 m = 8400 x 150 = ₹ 12,60,000/-
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