Subject: General Aptitude · Chapter: Volume and Surface Area · Exam: · Marks: · Difficulty:
The radius and height of a cylinder are in the ratio $5: 7$ and its volume is $4400 \mathrm{cm}^{3}$. Then its radius will be
(a)4 cm
(b)5 cm
(c)10 cm
(d)12 cm
Answer
Answer (as printed): C
Explanation
Let the radius and height of the cylinder be $5 x$ and $7 x \mathrm{cm}$ respectively. Then, volume $=\pi r^{2} h=\left[\frac{22}{7} \times(5 x)^{2} \times 7 x\right] \mathrm{cm}^{3}$