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Question

The ratio of the area of a rectangle to that of a square is 3:2. The perimeter of the square is 32 cm. The ratio of the breadth to the length of the rectangle is 2:3. Find the difference between the perimeter of the square and the rectangle.

A
34 cm
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B
8 cm
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C
12 cm
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D
20 cm
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Solution

The correct option is B 8 cm
The perimeter of squire is 32 cm
Then side of square =324=8 cm
Then area of square =(8)2=64 cm2
The ratio of the area of a rectangle to that of a square is 3:2
then area of rectangle =32×64=96 cm2
Let the length of rectangle angle is 3x, and breadth is 2x
Then area of rectangle =3x×2x=96
6x2=96x2=16x=4 cm
Then length of rectangle =3×4=12 and breadth =2×4=8 cm
Then perimeter of rectangle =2(12+8)=40
Then difference between the perimeter of the square and the rectangle =4032=8 cm

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