Q4 of 805 Page 17

The sides of the rectangle are in the ration , and its perimeter is 180 cm. Find its sides.

Property - Sum of the perimeter of the rectangle is 2 (l + b).


Let the length be 4x.


Therefore , breath is 5x


Perimeter = 2(4x + 5x) = 180


9x = 90 → x = 10


Length = 4x = 40cm and Breath = 5x = 50cm


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