Answer:
Volume = 
2512 = 3.14 × r^2 × 8




Dont get confused try to understand : )
Answer:
I didn't understood your question. But,
- Formula to find rate of interest=
<em>I×</em><em>1</em><em>0</em><em>0</em><em>/</em><em>P×</em><em>T</em>
(455) times (the average number of DVDs given to each visitor)
were given away.