the two sides of parallelogram are in the ratio of 3:4 the length of the parallelogram is 4.2 cm find its perimeter
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Explanation: If the two sides have a ratio of 3:4 , that means their sides can be represented as 3x and 4x , which also have a ratio of 3:4 . The perimeter is 56 .
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Let the sides be 3x and 4x. Then the perimeter of the parallelogram is 2(3x+4x)=2×7x=14x. The given data implies that 42=14x, so that x=42/14=3. Hence the sides of the parallelogram are 3×3=9 cm and 3×4=12 cm.
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