The ratio of two sides of a parallelogram is 3:4 . find the lengths of the sides , if its perimeter is 140 cm
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P = 2(l+b)
140 cm = 2 ( 3x+4x)
140cm/2 = 7x
70cm = 7x
70cm/7 = x
10 cm = x
the length of the side is 3x = 3×10 cm = 30cm
the breadth of the side is 4x = 4×10 cm = 40cm ans.
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