

MCQOPTIONS
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1. |
A square has its side equal to the radius of ball. The ball revolves round a side to generate a surface of total area X. If Y be the surface area of the sphere ,then which option is correct? |
A. | X=Y |
B. | X=2Y |
C. | X>Y |
D. | None of these |
Answer» B. X=2Y | |