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in Mathematics by (123k points)
यदि 28 सेमी. त्रिज्या वाले एक वृत्त की जीवा वृत्त के केन्द्र पर `90^(@)` का कोण आन्तरित करती है, जो दीर्घ वृत्तखण्ड का क्षेत्रफल है :
A. `392" सेमी."^(2)`
B. `1456" सेमी."^(2)`
C. `1848" सेमी."^(2)`
D. `2240" सेमी."^(2)`

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