Question

The area of a square field is 64 hectares. find cost of fencing it with wire at Rs 21.50 per metre. *

Answer 1

$\underline\mathrm \red {Answer:-}$

$\mathrm{Area \: of \: the \: field \: = \: 64 \: hectares \: = \: (64 \: × \: 10000) \: m² \: = \: 640000 \: m².} \\ \mathrm{Side \: of \: the \: field \: = \: \sqrt{Area} \: = \: \sqrt{640000} \: m \: = \: 800 \: m.} \\ \mathrm{Perimeter \: of \: the \: field \: = \: (4 \: × \: 800) \: m \: = \: 3200 \: m.} \\ \mathrm{Length \: of \: wire \: required \: for \: fencing \: = \: 3200 \: m.} \\ \mathrm{Cost \: of \: fencing \: = \: ₹ \: (3200 \: × \: 21.50) \: = \: ₹ \: 68800.}$