A solid right circular cylinder of height 1.21 m and diameter 28 cm is melted and recast into 7 equal solid cubes. Find the edge of each cube.
Solution:
(i) How many cubic metres of soil must be dug out to make a well 20 m deep and 2 m in diameter?
(ii) If the inner curved surface of the well in part (i) above is to be plastered at the rate of ₹50 per m2, find the cost of plastering.
Solution:
More Solutions:
- A road roller has a diameter of 0.7 m and its width is 1.2 m.
- The ratio between the curved surface and total surface of a cylinder is 1 : 2
- The given figure showed a metal pipe 77 cm long.
- Area of a parallelogram = base × …….
- Perimeter of a rectangle is the sum of lengths of its four sides.
- Area of a triangle is 30 cm2. If its base is 10 cm, then its height is
- If d is the diameter of a circle, then its area is