Question 165334
There is nothing wrong with your work!
I suspect that the answers given are all in terms of {{{pi}}}
If you work out your answer, but leave it in terms of {{{pi}}}, then you would get:
{{{V = (4/3)(91.125)(pi)}}}
{{{highlight(V = 121.5(pi))}}}cubic meters, and you can see that answer c is shown as 121.5 cubic meters, so check the answers given to see if {{{pi}}} has been omitted.