Question

4. A piece of square-shaped land has an area equal to 144 hectare. Find the cost of fencing it, if 1 m wire costs 3.50.​

Answer 1

Step-by-step explanation:

$area \: of \: square \: = side \times side \\ 144 = {(side)}^{2} \\ therefore \: side \: = 12cm \\ perimeter \: of \: square \: = 4 \times side \\ = 4 \times 12 \\ = 48cm \\ \\ the \: cost \: of \: fencing \: 1m \: = rs \: 3.5 \\ \\ so \: the \: cost \: of \: fencing \: 48m \\ = rs(3.5 \times 48) \\ = rs \: 168.$

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Answer 2

Answer:

see the attachment

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