Question

the length of a rectangle is three times the width. express the area, A as a function of the length, L

Answer 1

let the width be x. then, the length will be 3x=L.
therefore width x = L/3

Area = length * width
A= L * x
A = Lx

or

A = L*L/3 (since x= L/3)
A = L^2 /3

Answer 2

@shubham.bagrecha is correct. (:

Answer 3

A=L*W
Since the lengh is 3 times the width
then Area=L*1/3L