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 , how many meter of fencing
is required ?​

Answer 1

Answer:

if area of field is 6680m2

then

680= l×b

given leaving one side of 20 cm let it be l

680= 20 × b

b=680/20

b=34m

fencing to be fenced around 3 sides so let us find perimetere

perimeter of rectangle= 2(l+b)

= 2(20 + 34)

= 2× 54 = 108m

so perimeter of rectangle is 108m

it shall be fenced only three sides leaving a side of 20 cm that is 108-20=88m

so 88m lenght of fencing is needed

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