Question

Janet wants to build a fence around her square garden.her garden has an area of 81 square feet.How much fencing will Janet need?

Answer 1

Area of garden = 81 ft²

Area of square = side²

$\rm \implies side ^{2} = 81 \\ \\ \rm \implies side = \sqrt{81} \\ \\ \rm \implies side = \sqrt{ {9}^{2} } \\ \\ \rm \implies side = 9 \: ft$

Perimeter of square = 4 × Side

= 4 × 9

= 36 ft

$\therefore$ Fencing needed by Janet = 36 ft