What is the perimeter of a rectangle whose length is 8 cm and width is 5 cm?

Step-by-step solution

1. Use the perimeter formula for a rectangle: $P=2(l+w)$.
2. Substitute $l=8$ cm and $w=5$ cm: $P=2(8+5)$.
3. Calculate inside parentheses: $8+5=13$.
4. Multiply by 2: $2\times 13=26$.
5. Therefore the perimeter is $26$ cm.

Concept tested: Perimeter of rectangle

Published 1 October 2026 · How this solution was prepared and checked