Find the radius of sphere Whose surface area is 154 cm square
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As we know that Surface areA of Sphere=4πr^2
surface areA=154cm
By ℘ṳтт!ℵ❡ ṽᾰℓṳḙ.......!!
154=4×22/7×r^2
r^2=154×7/4×22
r^2=49/4
r=√49/2
r=7/2
r=3.5......,.......!!!!
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