Q. The number of sleepers per rail (n = length of rail in metres) (Solved)
1. is n + 1
3. varies from n + 9 to n + 12
4. varies from n + 3 to n + 6
5. varies from n + 1 to n + 3
- d. varies from n + 3 to n + 6
1. is n + 1
3. varies from n + 9 to n + 12
4. varies from n + 3 to n + 6
5. varies from n + 1 to n + 3