Find radius of a sphere whose surface Area is 154cm^2

1.	Find radius of a sphere whose surface Area is 154cm^2
Answer» area of sphere=4 pi r3so ,154=4×22/7×r2154=88/7×r2154/88/7=r2154/88/7=r2so r=root of 49/4so aftr removing root we get =7/2

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