The ratio of the perimeter and the breadth of a rectangle is 9 : 2. Find its area if its length is 10 cm.
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Answer: L = 10 cm. and B = ?
2(L+B):B = 9:2
4L+4B = 9B
5B = 4L = 4*10 = 40
B, the breadth = 8 cm. Answer.
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