alleryएक गोलाकार ढक्कन की त्रिज्या 3.5 cm है; इसकी रिम लंबाई क्या है? π = 22/7 का प्रयोग करें।
A38.5 cm
B44 cm
C22 cm
D11 cm
Answer & Solution
Correct answer: C. 22 cm
रिम की लंबाई 2 × (22/7) × 3.5 = 22 सेमी है।
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