Mathematics for IGCSE & O level - Similarity (Section 2 - No. 38)
The surface area of a container is 100 cm². If the container is enlarged with a length scale factor of 3, what will be the new surface area?
300 cm²
600 cm²
900 cm²
1200 cm²
Explanation
Area scale factor = length scale factor squared = 3² = 9. New area = 100 * 9 = 900 cm².
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