Question

A rectangular field is to be fenced on three sides,leaving a side of 20bcm uncovered. If the area of the field is 680 cm sq. ,how many metre of fencing is required​

Answer 1

Answer:

Length of the fencing = 88 m

Explanation:

Dimensions of a Rectangular field :

Length = l m

breadth (b) = 20m

i )Area of the field = 680m²

=> l × b = 680 m²

=> l = \frac{680m^{2}}{20m}

=> l = 34 m ---(1)

ii ) If the field is fenced on three sides, leaving one side uncovered,

then

length of the fencing = 2l+b

= 2×34+20

= 68+20

= 88 m

Therefore,

Length of the fencing = 88m