Question

find the radius of a sphere whose surface area is 154cm.​

Answer 1

surface area of sphere= 4πr^2
154= 4×22/7×r^2
154×7/22*4=r^2
5929=r^2
r=77..........


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Answer 2

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