A solid sphere of diameter 7 cm is cut into two equal halves

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78

M: +2.00/-0.50

A solid sphere of diameter 7 cm is cut into two equal halves. What will be the increase (in cm2) in the total surface area ?

[2017 SSC CGL 11 AUG Shift 2]

A 77

B 154

C 87

D 38.5