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
- What is the area of an isosceles triangle with base 6 cm and equal sides 5 cm each?
- What is the volume of a cone with base radius 3 cm and vertical height 7 cm? (Use π = 22/7)
- A tent is in the form of a cylinder surmounted by a cone. If the height and diameter of the cylindrical part are 2.1 m and 4 m, and slant height of the cone is 2.8 m, find the area of the canvas used.
- Three cubes of sides 3cm, 4cm and 5cm are melted to form a single cube. Find the total surface area of the new cube.
- If the radius of a sphere is increased by 10%, what is the percentage increase in its volume?