alleryਇੱਕ ਕੋਨ ਦਾ ਕੁੱਲ ਸਤਹ ਖੇਤਰਫਲ ਪਤਾ ਕਰੋ ਜਿਸਦਾ r = 7 cm ਅਤੇ l = 25 cm (pi = 22/7) ਹੋਵੇ।
A704 cm²
B858 cm²
C154 cm²
D550 cm²
Answer & Solution
Correct answer: A. 704 cm²
ਕੁੱਲ ਖੇਤਰਫਲ pi r (l + r) = 22 x 32 = 704 ਵਰਗ ਸੈਂਟੀਮੀਟਰ, ਵਕਰ ਵਾਲਾ ਹਿੱਸਾ 550 ਅਤੇ ਅਧਾਰ 154 ਹੈ।
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