Question

A rod 86cm long is bent in the form of rectangle such that its length is 7cm greater than its breadth find length and breadth ​

Answer 1

Let b be x

Therefore l=x+7

Perimeter = 2(l+b)

86=2(x+7+x)

86=2(2x+7)

86=4x+14

4x=72

X=18

B=18

L=25

Area=lb

=18*25

=450

Answer 2

Here, 2(l+b)=84cm.

=(l+b)=42cm.

Given,l=b+7

=b+7+b=42cm

=2b+7=42cm

=2b=35cm

=b=17.5cm

And, l=b+7=17.5+7=24.5

Therefore,

Length=17.5cm

Breath=24.5cm

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