The volume and height of a cylinder are 8470 cm³ and 2.2 cm, respectively. Find the radius (in cm) of the cylinder.
Use $$\pi$$ = $$\frac{22}{7}$$​

Correct option is A

​Given:
Volume of cylinder = 8470
Height of cylinder(h) = 2.2 cm

Formula Used:

Volume of cylinder = $$\pi r^2 h$$​​

Solution:

Volume of cylinder = $$\frac{22}{7} \times r \times r \times 2.2$$​​

8470 = $$\frac{22}{7} \times r \times r \times 2.2$$ 
​$$r^2 = \frac{8470 \times 7}{22 \times 2.2} \\r^2 = 1225 \\r = \sqrt{1225} = 35 \text{ cm}$$​​