Question

area of playground is 38400 square m. if the ratio of length and breadth of playground is 3:2 then find the perimeter of playground.

Answer 1

Answer:

let length be 3x.

then by ratio, breadth is 2x.

Then, area is 6x*x=38400.

perimeter=10x.

from area equation, x*x=6400.

Hence x=80.

perimeter=800.

Answer 2

let l and b be x
then , area of playground = 3x ×2x
38400 ÷ 6 = x × x
6400 = x × x
80 = x
l = 3×80 = 240
b = 2 × 80= 160
perimeter = 2 (l+b)
= 2 × 400
= 800 m
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