Question

3. Use an algebraic equation to solve the problem,
A rectangle is 3 times as long as it is wide. The perimeter is 60 cm. Find the dimensions of the rectangle.
Round to the nearest tenth if necessary.
7.5 cm by 22.5 cm
7.5 cm by 52.5 cm
20 cm by 60 cm
15 cm by 22.5 cm​

Answer 1

Answer:

20centimeters by 60 centimeters

Answer 2

Answer:

let 'w' represent the width, then '3w' represents the length

perimeter = 2(l+w), where 'l' and 'w' are length and width, respectively

60 = 2(w+3w) = 8w

w = 60/8 = 7.5

3*7.5 = 22.5

the width is 7.5 cm, the length is 22.5 cm