alleryਪਾਈ ਨੂੰ 22/7 ਮੰਨ ਕੇ, 7 ਸੈਂਟੀਮੀਟਰ ਅਰਧ ਵਿਆਸ ਵਾਲੇ ਚੱਕਰ ਦਾ ਖੇਤਰਫਲ ਕੀ ਹੈ?
A154 cm²
B49 cm²
C44 cm²
D308 cm²
Answer & Solution
Correct answer: A. 154 cm²
ਚੱਕਰ ਦਾ ਖੇਤਰਫਲ pi r ਵਰਗ ਹੈ, ਇਸ ਲਈ (22/7) x 49 = 154 ਵਰਗ ਸੈਂਟੀਮੀਟਰ।
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