Mensurationmedium · Past Paper
A road roller is cylindrical in shape. If its diameter is 1 m and length 1.4 m, what is the area it covers in 500 revolutions?
A2200 m²
B4400 m²
C1100 m²
D220 m²
✓ Correct Answer: A — 2200 m²
r = 0.5 m, h = 1.4 m. CSA = 2πrh = 2 * (22/7) * 0.5 * 1.4 = 4.4 m². Total area = 4.4 * 500 = 2200 m².
Share this question
More from Mensuration
- The radius of a cylinder is doubled and the height is halved. What is the change in volume?
- The ratio of the total surface area to the curved surface area of a cylinder is 3:2. If the total surface area is 462 sq. cm, find its volume.
- The area of a circle and a square are equal. What is the ratio of the side of the square to the radius of the circle?
- A cubical block of metal weighs 16 kg. What is the weight of another block of the same metal whose each side is double that of the first block?
- A solid consisting of a right circular cone of height 120 cm and radius 60 cm standing on a hemisphere of radius 60 cm is placed upright in a right circular cylinder full of water such that it touches the bottom. If the radius of the cylinder is 60 cm and its height is 180 cm, find the volume of water left in the cylinder.