Answer / pardeep kumar

D

Answer / anonymous

88

Answer / anirudh

Asnswer Is 88.

Explanation :-
Rectangle has 4 sides with opposite sides equal in length. Let these be a,b
Now, we are given area as 680
ie. a*b=680
If a=20, then b=34

Now fencing is to be done on 3 sides leaving one a side i.e 2b+a
2*34+20 =88

Answer / rajeev sinharoy

d) 88

Answer / santhoshi

lb=680;
l*20=680;
l=34;
three sides fencing =2 sides length + one side breadth.
=2*38 + 20
=88;
so answer "d";

Answer / kishor

Area =length x breadth
breadth=20
area given=680
length=area/breadth=680/20=34
so when 20 ft.side is to be left only two length side and 1 breadth is to be fenced so
2x34+20=68+20=88 ft.

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