Question

the ratio of adjacent sides of parallelogram is as 2:3 and its perimeter is 40 find the sides of parallelogram

Answer 1

let the ratio be 2x and 3x.
perimeter of a parallelogram = 2 ( l + B)
40 = 2 ( 2x + 3x )
40 /2 = 5x
20 = 5x
x = 20/ 5
x = 4
one side = 2x = 2*4 = 8 unit ans.
second side = 3x = 3*4 = 12 unit ans.
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Answer 2

Let the length of one side of parallelogram be 2x
So, the length of it's adjacent side =3x
A/Q,
$perimeter = 40 \\ 2(sum \: of \: adjacent \: side) = 40 \\ 2(2x + 3x) = 40 \\ 5x = \frac{40}{2} \\ 5x = 20 \\ x = \frac{20}{5} \\ x = 4 \\ so \: one \: side = 2x = 2 \times 4 = 8 \\ adjacent \: side = 3x = 3 \times 4 = 12$