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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. $$56 cm.^2$$ | |