Problema Solution
The area of a rectangle is 28 square inches. The length is 8 more than thrice the width. Find the length and the width.
Answer provided by our tutors
let
l = the length of the rectangle, l>0
w = the width of the rectangle, w>0
The area of a rectangle is 28 square inches
l*w = 28
The length is 8 more than thrice the width
l = 8 + 3w
plug l = 8 + 3w into l*w = 28
(8 + 3w)*w = 28
by solving we find
w = 2 in
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l = 8 +3*2
l = 14 in
the width is 2 inches while the length is 14 inches.