Question

The length of a rectangle is twice its width. if the area of the rectangle is 50 yds2 , find its perimeter

Answer 1

hello :
x : length y : width
xy = 50 ...(1)
x = 2y ...(2)
dubsct in (1) :
(2y)(y) = 50
y² = 25
y = 5
x = 10