Problema Solution
the length of a rectangle is 3 inches more than the width. the are of the rectangle is 70 square inches. 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 length of a rectangle is 3 inches more than the width
l = 3 + w
the area of the rectangle is 70 square inches
l*w = 70
plug l = 3 + w into the last equation
(3 + w)*w = 70
by solving we find
w = 7 in
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l = 3 + 7
l = 10 in
the length is 10 inches.
the width is 7 inches.