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Q. |
The number of sleepers per rail (n = length of rail in metres) |
A. | is n + 1 |
C. | varies from n + 9 to n + 12 |
D. | varies from n + 3 to n + 6 |
E. | varies from n + 1 to n + 3 |
Answer» D. varies from n + 3 to n + 6 |
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