Question

The rectangular field has to be fenced on three sides leaving one side of 20 feet uncovered.The total area of the field is 680 feet how many feet of fencing will be required ?

Answer 1

Heya mate,Here is ur answer

Given : The field is rectangular

Length=20 feet

Area =680 feet^2

Area of rectangle=length×breadth

680=20×breadth

$\frac{680}{20} = breadth$

34 feet=breadth

Given that the fencing is done only on three sides and one side of 20 feet is left.

Fencing done =Perimeter-Length left

=2(l+b)-20

=2(20+34)-20

=2×54-20

=108-20

=88 cm

So length of fence required=88 cm

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@Laughterqueen

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Answer 2

$\huge {\mathfrak {Solutions :- }}$

Given :

Breadth of rectangular field = 20 feet
Area of field = 680 feet²

Find the length of the rectangular field :-

Length = Area/Breadth
Length = 680/20 = 34 feet

Find the perimeter of rectangular field :-

Perimeter = 2(Length + Breadth)
= 2( 34 + 20) feet
= 2 × 54 feet
= 108 feet

We have to fenced the rectangular field on three sides leaving one sides. So,

Perimeter - Breadth
(108 - 20) feet = 88 feet

Hence,
88 feet of fencing will be required.