Question

Find the perimeter of the rectangle

Answer 1

Explanation:

perimeter = 2 (l + b)

= 2 {(2/3x+ 10) + (1/3x + 5)}

= (4/3x + 10) + (2/3 + 10)

= 4/3x + 20 +2/3 + 10

= 6/3x + 30

= 3x + 30