Mensurationhard · Past Paper
Find the lateral surface area of a regular square pyramid whose base area is 100 sq. cm and vertical height is 12 cm.
A260 cm²
B240 cm²
C130 cm²
D520 cm²
✓ Correct Answer: A — 260 cm²
Side a=10. l = sqrt(12² + 5²) = 13. LSA = 2al = 2 * 10 * 13 = 260 cm².
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