A) 1 : 2
B) 1 : 1
C) 3 : 4
D) 4 : 3
Correct Answer: C
Solution :
[c] Perimeter of circular sheet \[=2\pi r=20\pi \,cm\] \[\therefore \]The perimeter of base of conical surface \[=20\pi \times \frac{100-40}{100}=12\pi \] ![]() |
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