Question

The perimeter of a rectangle is 30 cm if the width is 5cm what is the length

Answer 1

10cm

Explanation:

Perimeter of rectangle=30cm

width=5cm

length=?

p =w+w+l+l

30 =5+5+2L

30 =10+2L

30-10=2L

20 =2L

20÷2=L

10 =L

L =10cm

second method

=30-5-5

=20÷2

=10cm