-
What part of a ditch, 48 metres long, 16.5 metres broad and 4 metres deep can be filled by the earth got by digging a cylindrical tunnel of diameter 4 metres and length 56 metres ? (Use π = 22/7)
-
- 1/9
- 2/9
- 7/9
- 8/9
- 1/9
Correct Option: B
Volume of earth taken out = πr²h
| = | × 2 × 2 × 56 = 704 m³ | |
| 7 |
Volume of the ditch = 48 × 16.5 × 4 m³
= 3168 m³
| Part of the ditch filled = | = | ||
| 3168 | 9 |
