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Question

Perimeter of a rectangle is 44 cm. If its length is 9 cm, then its breadth is


A

13 cm

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B

12 cm

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C

11 cm

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D

10 cm

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Solution

The correct option is A

13 cm


We know that if 'l' is the length of the rectangle and 'b' is its breadth, then its perimeter is given by

P=l+b+l+b=(2×l)+(2×b)

Given P=44 cm and l=9 cm

Then,

P=(2×l)+(2×b)

b=P(2×l)2

i.e., b=44(2×9)2= 13cm


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