Millionaire Mode

Volume of cylinder - class-IX

Question 1 of 39

The volume, V $cm^{2}$, of a hollow cylindrical pipe of length $l$ cm, outer radius R cm and inner radius r cm is given by the formula : $V, =, \pi, (R^{2}, -, r^{2})., l$

Find r, if $V, =, 22,, R, =, 2,, l, =, 4$ and $\pi,, 3\displaystyle \frac{1}{7}.$

  1. 1.5
  2. 1.2
  3. 1.4
  4. 1.6

Prize Money

15₹7 Crores
14₹1 Crore
13₹50,00,000
12₹25,00,000
11₹12,50,000
10₹6,40,000
9₹3,20,000
8₹1,60,000
7₹80,000
6₹40,000
5₹20,000
4₹10,000
3₹5,000
2₹2,000
1₹1,000