Question

A rectangle has a width of 51 centimeters and a perimeter of 216 centimeters. What is the rectangle's length?

The length is ___ cm

Answer 1

57

Explanation:

p=2(l+b)

216=2(l+51)cm

216/2=l+51

108=l+51

l=108-51

57

Answer 2

57cm

Explanation:

There are:

(width + length)*2= perimeter

<=> (51 + length)*2 = 216

<=> lenghth= (216/2) -51= 57