The width of the room is 60% of its length. Find the size of the room if its perimeter is 20 m.

univerkov | January 4, 2021 | education

Let x be the length of the room, then 0.6x the width of the room.
Perimeter 20 m
P = 2W + 2D, where P is the perimeter, W is the width, D is the length.
20 = 2 * 0.6x + 2x
20 = 1.2x + 2x
20 = 3.2x
x = 6.25
6.25 is the length of the room, then 0.6 * 6.25 = 3.75 the width of the room.
Answer: the length of the room is 6.25 m, the width of the room is 3.75 m.

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