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Lesson eLearning

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

easy 1 mark Class 5 · Mathematics · Shapes and Angles

Answer

26 cm

The correct answer is 26 cm — Multiply by 2: $P = 2 \times 13 = 26$

Step-by-step solution

Write formula for perimeter of rectangle: $P = 2 (l + b)$
Substitute given values: $P = 2 (8 + 5)$
Compute inside parentheses: $8 + 5 = 13$
Multiply by 2: $P = 2 \times 13 = 26$

Common mistake: Forgetting to multiply the sum of length and breadth by 2

Concept tested: Perimeter of rectangle

Published 4 October 2026 · How this solution was prepared and checked

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