InterviewSolution
Saved Bookmarks
| 1. |
The total surface area of a right circular cylinder is 23100 cm2 and its volume is _______ cm3. The ratio of curved surface area of the cylinder to the total area of its two bases is 2 : 1.1). 269050 cm32). 269550 cm33). 268500 cm34). 269000 cm3 |
|
Answer» SURFACE Area of TWO bases = 2πr2 Curved Surface Area of CYLINDER = 2πrh According to the question, ⇒ 2πrh/2πr2 = 2/1 ⇒ 2R = h Total surface area the cylinder ⇒ 23100 = 2πr × (r + h) ⇒ 23100 = 2 × (22/7) × r(r + 2r) ⇒ 3r2 = 23100 × 7/44 ⇒ r = 35 Volume of the right circular cylinder = πr2h = (22/7) × 352 × 70 = 269500 cm3 |
|