Q. Maximum permissible velocity 1.5 m/sec, is adopted in drains (Solved)
1. With beds of rocks and gravels
2. Lined with stones
3. Both (a) and (b)
4. Neither (a) nor (b)
- c. Both (a) and (b)
1. With beds of rocks and gravels
2. Lined with stones
3. Both (a) and (b)
4. Neither (a) nor (b)