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Which of the following statement is INCORRECT? (A) If from a solid cubic block a hemisphere of maximum diameter is cut-off, then surface area of the cubic block is decrease.(B) If two sphere are melted to form a cylinder, then surface area of cylinder is the sum of surface area of two sphere. (C) If a wire is wound about.a cylinder so as to cover the whole surface, then length of the wire is equal to the surface area of the cylinder. (D) All of these. |
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Answer» The correct option is: (B) If two sphere are melted to form a cylinder, then surface area of cylinder is the sum of surface area of two sphere. |
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