find the radius of a sphere whose surface area is 154 cm square
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Answer:
3.5 cm
Step-by-step explanation:
TSA of sphere = 4πr ^2
Thus,
4 × ( 22 / 7 ) × r^2 = 154
r ^2 = ( 154 × 7 ) / ( 22 × 4 )
r ^2 = 49 / 4
r = ✓ ( 49 / 4 )
r = 7 / 2
r = 3.5 cm
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refer to the attachment spider man
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