proportions, grade 9, question 16

03/12/2016 Grade 9


a) Find the dimensions of a rectangle that are proportional to 7 and 5 knowing that the perimeter is 96.

b) Deduce the area of a rectangular carpet of the same dimensions.

c) If 20% of this carpet is red, denote by x the area of the carpet and by y the red area.

Express y interms of x.

d) Deduce the value of the red area.