A 600 meter long train crosses a signal post in 40 seconds. How long will it take to cross a 1.8 kilometer long bridge, at the same speed?
Choose the correct choice from the following choices
A) 4 min
B) 2 min
C) 8 min
D) 9 min
E) 3 min

Rationale: s = 600 / 40 = 15 mps s = 1800 / 15 = 120 sec = 2 min . answer : b
Answer: B