Question

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 necassary.

Answer 1

180

Explanation:

60 x 3 =180

Answer 2

l=22.5≅23 cm and w=7.5≅8 cm

Explanation:

l=3w

p=60 cm

p=2(l+w)

60=2(3w+w)

60=2(4w)

60=8w

`(60)/(8)=(8w)/(8)`

w=7.5≅8 cm

l=3w

l=3*7.5

l=22.5≅23 cm

check

p=2(l+w)

p=2(22.5+7.5)

p=2(30)

p=60 cm