Geometry

Solids

Easy

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

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

Rs 88

Rs 176

Rs 78

Rs 186

✅ Correct Option: 1

Outer (curved) surface area of the cylinder equals the area of the rectangular paper.

$= 22 \times 8 = 176 \text{ cm}^2$ .

Cost $= 176 \times 0.5 = \text{Rs } 88$ .

Question 38

The radius of the cylinder is-

Question 40

The volume of cylinder is

Solution