Highway Engineering - Engineering

Q1:

If the difference in elevation of an edge of the pavement 9 m wide and its crown is 15 cm, the camber of the pavement, is

A 1 in 60

B 1 in 45

C 1 in 30

D 1 in 15

E 1 in 7.5

ANS:C - 1 in 30

Thanks everyone for the explanation.