1.

A solid sphere of diameter 7 cm is cut into two equal halves. What will be the increase (in cm.2) in the total surface area?

A. $$88 cm.^2$$
B. $$77 cm.^2$$
C. $$56 cm.^2$$
D. $$66 cm.^2$$
Answer» C. $$56 cm.^2$$


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