A train 360 m long runs with a speed of 45 km/hr. What time will it take to pass a platform of 140 m long? Choose the most appropriate option:
A) 38 sec
B) 35 sec
C) 44 sec
D) 40 sec
E) none of these
Speed = 45 km/hr = 45 × (5/18) m/s   = 150/12 = 50/4 = 25/2 m/s   Total distance = length of the train + length of the platform   = 360 + 140= 
<gadget id="calculator">360 + 140</gadget>
<output>500</output>
500 meter   Time taken to cross the platform= 500/(25/2) = 500 × 2/25 = 40 seconds   ANSWER:40 sec
<result>D</result>
A train 360 m long runs with a speed of 45 km/hr. What time will it take to pass a platform of 140 m long?