Question

Find the length of a rectangle given that its perimeter is 780 m and breadth is 120 m.

Answer 1

P = 2 (l+b)

P = 2l +2b

780 = 2l + 2(120)

2l = 780 - 240

2l = 540

= 270
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length = 270 m

Answer 2

In the question,
Given,
Perimeter = 780 m
Breadth = 120 m

In order to Find Length,

P = 2(l+b)
=> 780 m = 2(l+120)
=> 780 = 2l + 240
=> 780-240 = 2l
=> 540 m = 2l
=> 540/2 m = l
=> l = 270 m


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