D = 110 + 170 = 280 m
S = 72 * 5/18 = 20
T = 280 * 1/20 = 14 sec
How long does a train 110 m long traveling at 72 kmph takes to cross a bridge of 170 m in length?

A: 16.5
B: 16.0
C: 16.4
D: 14
E: 16.1