Question

the perimeter of a parallelogram is 84cm.the ratio of its two sides is 2:4.find the lengths of all sides​

Answer 1

Answer:

12,14,12,14

Step-by-step explanation:

2;4

2a and 4a

so all sides is 2a,4a,2a,4a,

so,2a+4a+2a+4a=84

12a=84

a=84/12

a=7

so all sides are 12,14,12,14.

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Answer 2

Answer:

Let the length be 2x

and the breadth be 4x

Perimeter of the parallelogram ( llgm) = 84 cm

= 2(l+b) = 84 cm

= 2(2x+4x) = 84

= 2×6x = 84

= 12x = 84

therefore, x = 84/12 = 7cm

Hence, length = 2x = 2×7 = 14cm

and breadth = 4×7 = 28 cm

Verification :-

2(14+28)

= 2×42 = 84 cm.

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