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Question

The breadth of a rectangle whose area is 600 square metres and perimeter is 100 metres, is ___ metres.


A

20

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B

22

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C

25

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D

15

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Solution

The correct option is A

20


Perimeter = 100 m

2(length + breadth) = 100

length + breadth = 50

Let breadth = x

then length = 50x

Given that area = 600 sq m

x(50x)=600

50xx2=600

x250x=600

x250x+625=600+625

(x25)2=25

(x25)=5

x = 20 m


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