A) 2 : 1
B) 1 : 2
C) 1 : 3
D) 1 : 1
Correct Answer: D
Solution :
Height of the cylinder = 2 r Curved surface area of the cylinder \[=2\,\,\pi RH\] \[\therefore \] Required ratio \[=4\pi {{r}^{2}}:2\pi \times r\times 2r=1:1\]You need to login to perform this action.
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