Question

A rectangle has a perimeter of 30cm the width of the rectangle is n cm the length of the rectangle is n+6cm

What’s the value of n

Answer 1

Explanation:

p=2(l+w)

30cm=2(n+6+n)

30cm\2=2n+6

15cm-6=2n

9cm=2n

n=4.5cm or w=4.5cm

l=w+6

l=4.5cm+6

l=10.5cm