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The radius of a metallic cylinder is 3 cm and its height is 5 cm. It is melted and moulded into small cones, each of height 1 cm and base radius 1 mm. The number of such cones formed,is
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- 450
- 1350
- 8500
- 13500
- 450
Correct Option: D
Volume of cylinder = πr²h = π × 9 × 5 = 45π cu.cm.
| Volume of a cone = | πr²h | |
| 3 |
| = | × π × | × 1 | ||
| 3 | 100 |
| = | cu.cm | |
| 300 |
| ∴ Number of cones = | = 13500 | ||
| 300 | |||
