InterviewSolution
Saved Bookmarks
| 1. |
If a cylinder of radius 4.3 cm and height 4.8 cm is melted and constructed into a cone of the same radius, what will be the height of this cone? (Use π = 22/7)1). 28.8 cm2). 14.4 cm3). 7.2 cm4). 21.6 cm |
|
Answer» A CYLINDER of radius 4.3 cm and HEIGHT 4.8 cm is melted and constructed into a cone of the same radius. So, the volume of the cylinder = π × r2 × h = (22/7) × 4.32 × 4.8 cm3 Let the height of the cone be h. So, the volume of the cone = (1/3) × π × r2 × h = (1/3) × (22/7) × 4.32 × h cm3 Now we can WRITE, (1/3) × (22/7) × 4.32 × h = (22/7) × 4.32 × 4.8 ⇒ h = 4.8 × 3 ⇒ h = 14.4 ∴ The height of the cone = 14.4 cm |
|