alleryਇੱਕ ਗੋਲੇ ਦਾ ਸਤਹ ਖੇਤਰਫਲ ਪਤਾ ਕਰੋ ਜਿਸਦਾ ਅਰਧ ਵਿਆਸ 7 cm (pi = 22/7) ਹੈ।
A154 cm²
B308 cm²
C1437 cm²
D616 cm²
Answer & Solution
Correct answer: D. 616 cm²
ਸਤ੍ਹਾ ਖੇਤਰਫਲ 4 pi r ਵਰਗ = 4 x (22/7) x 49 = 616 ਵਰਗ ਸੈਂਟੀਮੀਟਰ ਹੈ।
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