Medium Math Class 9 Level 10

If the radius of a sphere is 56 cm then what is its surface area?

गोले की त्रिज्या 56 cm है तो उसका पृष्ठीय क्षेत्रफल क्या होगा?

A 19712 cm² / 19712 cm² B 39424 cm² / 39424 cm² C 78784 cm² / 78784 cm² D 9856 cm² / 9856 cm²
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Correct Answer

B. 39424 cm² / 39424 cm²

Explanation

Surface area = 4πr² = 4 × 22/7 × 56² = 39424 cm².

पृष्ठीय क्षेत्रफल = 4πr² = 4 × 22/7 × 56² = 39424 cm²।

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