Curved Surface Area of a Right Circular Cylinder

Q. The diameter of a roller 120 cm long is 84 cm. If it takes 500 complete revolutions to level a playground, determine the cost of levelling at the rate of Rs 50 per square metre.

[Use π =$\frac{22}{7}$]

Q. A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior. The diameter of the pencil is 7 mm and the diameter of the graphite is 1mm. If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.

Q.

Question 5
A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs. 12.50 per $m^2.[Assume\pi =\frac{22}{7}]$

Q.

Two edges of a rectangular sheet of paper having dimensions 14m $\times$ 7m are held together so that it forms a cylinder. Find the curved surface area of the cylinder.

1. 98 m²

2. 88 cm²

3. 78 m²

4. 100 cm²

Q. A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior.The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm.If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.
$[Assume\pi =\frac{22}{7}]$

Q.

1. True
2. False

Q. A room $8cm$ long, $6cm$ broad and $3cm$ high has two window $1\frac{1}{2}m\times 1m$ and door $2m\times \frac{1}{2}m$ Find the cost of papering the walls with paper $50cm$ wide at $25p$ per meter.

1. $Rs.40$
2. $Rs.36$
3. $Rs.44$
4. $Rs.33$

Q. A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior.The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm.If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.
$[Assume\pi =\frac{22}{7}]$

Q. The diameter of a roller 120 cm long is 84 cm. If it takes 500 complete revolutions to level a playground, determine the cost of levelling at the rate of Rs 50 per square metre.

[Use π =$\frac{22}{7}$]

Q. Kyle bought 2 snack boxes. Box A has a measure of $2in\times 3in\times 5in.$ Box B has a measure of $11in\times 4in\times 3in.$ Find the surface area of the boxes and their difference.

1. $279{in}^2$
2. $116{in}^2$
3. $201{in}^2$
4. $198{in}^2$

Q. A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior. The diameter of the pencil is 7 mm and the diameter of the graphite is 1mm. If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.