Geometry

Solids

Medium

A rectangular paper of width 8cm and length 22cm rolled along it width and a cylinder is formed.

On the above Intimation, Solve the question given below

The volume of cylinder is

98 cm^3

49 pi cm^3

49 cm^3

98 pi cm^3

✅ Correct Option: 4

Radius $r = \frac{7}{2}$ cm, height $h = 8$ cm.

Volume $= \pi r^2 h = \pi \times \frac{49}{4} \times 8 = 98\pi \text{ cm}^3$ .

Question 38

The radius of the cylinder is-

Question 39

If the outer surface area of cylinder is pointed @ Rs 0.5/cm^2, then the total cost of painting is

Solution