Question

The length of a rectangle is 3 times the

width. Find the dimensions of the
rectangle if its perimeter is 16 cm.

Answer 1

Explanation:

length = 3×width

2×length + 2×width = 16

length + width = 8

we can use the first equation in the second :

3×width + width = 8

4×width = 8

width = 2 cm

therefore,

length = 3×width = 3×2 = 6 cm