5. A rectangular piece of land measures 0.7 km by 0.5 km. Each side is to be
fenced with 4 rows of wires. What is the length of the wire needed?
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The perimeter of the rectangular piece of land = l×b
= 0.7 × 0.5
= 0.35 km^2
number of rows to be fenced = 4
length of wire = 0.35 × 4
= 1.4 km
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