A) 60
B) 68.8
C) 72.8
D) 75
Correct Answer: C
Solution :
Volume of cone\[=\frac{1}{3}\pi {{r}^{2}}h\] Single equivalent increase in radius \[=\left( 20+20+\frac{20\times 20}{100} \right)%=44%\] Single equivalent percentage effect for 44% and 20% \[=\left( 44+20+\frac{44\times 20}{100} \right)%\] = (64 + 8.8)% = 72.8% = Increase in volumeYou need to login to perform this action.
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