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The number of sleepers used for rails varies from, Where 'n' length of rail in 'm'

The number of sleepers used for rails varies from, Where 'n' length of rail in 'm' Correct Answer (n + 3) to (n + 6)

Explanation:

Sleeper Density:

Sleeper density means no of rails per rail length and it is represented by N + x;

Where N is the rail length and x is an integer that varies from 3 to 7.

For Ex. If the sleeper the density is N + 5, on broad gauge track and the length of rail is 13 m then 13 + 5 = 18 sleepers will be used per rail length on that route.

∴ Sleeper density varies from N + 3 to N + 7.

∴ The most appropriate answer is (n + 3) to (n + 6).

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