find the radius of a sphere whose surface area is 154cm.
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find the radius of a sphere whose surface area is 154cm.
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154= 4×22/7×r^2
154×7/22*4=r^2
5929=r^2
r=77..........
please mark as brainlist......
Answer:
3.5 cm
Step-by-step explanation:
SA of sphere = 4πr²
154=4×22÷7×r²
r²=154×7÷4×22
r²=49÷4
r=√49÷√4
r=7÷2
∴r=3.5