Question

a rectangular field is to be fenced on three sides leaving a side of 20 cm uncovered if the area of the field is 680 m square how many metre of fencing is required

Answer 1

Length * Breadth = Area of a rectangle

20 * Length = 680 square metre

Length = 680 / 20

Length = 34 m

Perimeter of rectangle is = 2 (L + B)

2 (34 + 20)

= 108 m


Remove the unwanted measure

i.e, 108 - 20

= 88 m


OR

Find,

(2 * 34) + 20

68 + 20

= 88 m










Hope it helpz

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