A bus covers a distance of 12 km in 5 min. If it takes 5 sec to pass a telegraph post, then the length of the bus is?	Pick.
A) 120 m
B) 180 m
C) 240 m
D) 200 m
E) 280 m

Rationale: speed = ( 12 / 5 * 60 ) km / hr = ( 144 * 5 / 18 ) m / sec = 40 m / sec . length of the bus = 40 * 5 = 200 m . answer : d
Answer: D