किसी वलय की भीतरी त्रिज्या 10 सेमि और चौड़ाई 5 सेमी है। वलय का क्षतेरफल निकले
The inner radius of a ring is 10 cm and width is 5 cm. Curl of the ring
suraniparvin:
What u need? Do u want circumference or area?
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