If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissible rate of change of grade per chain length is 0.10%, the length of the vertical curve, is

If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissi

1.	If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissible rate of change of grade per chain length is 0.10%, the length of the vertical curve, is
A.	DN + G (4N + l +N2)
B.	10 chains
C.	12 chains
D.	14 chains
Answer» D. 14 chains

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If a 0.7% upgrade meets a 0.65% downgrade at a summit and the permissible rate of change of grade per chain length is 0.10%, the length of the vertical curve, is

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