If w is width of sleepers, s is sleeper spacing and d is depth of ballast then
d = \(\frac { S-W } { 2 }\)
d =\(\frac { S-W } { 3 }\)
d =\(\frac { S-W } { 4 }\)
d = \(\frac { S-W } { 5 }\)
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Answer : Option A
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