A) 1764 cu cm
B) 880 cu cm
C) 440 cu cm
D) 220 cu cm
Correct Answer: C
Solution :
\[\because \] \[{{r}_{1}}=4\,cm\] and \[{{r}_{2}}=3\,cm\] \[h=20\,cm\] \[\therefore \] Volume of iron \[=\pi (r_{1}^{2}-r_{2}^{2})\times h\] \[=\frac{22}{7}({{4}^{2}}-{{3}^{2}})\times 20\] \[=\frac{22}{7}(16-9)\times 20\] \[=22\times 20=440\,cu\,cm\]You need to login to perform this action.
You will be redirected in
3 sec