Find the radius of the sphere if the suface area is 154cm
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Answer:3.5 cm
Step-by-step explanation:
The S.A. Of a sphere is 4πr²
So 4*22/7*r²=154
Transposing
154*7/22*4=r²
49/4=r²
7/2=r
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surface area of sphere = 4πr^2
so, 154 =4× 22/7×r^2
r ^2= 154×7/88
r^2=49/4
r=7/4
r=1.75
so, 154 =4× 22/7×r^2
r ^2= 154×7/88
r^2=49/4
r=7/4
r=1.75
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