If the surface area of sphere is 154 cm , then its radius in cms.
If the surface area of sphere is 154 cm , then its radius in cms.
A) 7
B) 14
C) 21
D) 7/2
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If the surface area of sphere is 154 cm , then its radius in cms.
A) 7
B) 14
C) 21
D) 7/2