Question

300 m long train crosses a pole in 24 sec. What is the speed of the train in km/hr ?
1) 45 km/hr
2) 60 km/hr 3) 36 km/hr 4) 42 km/hr.​

Answer 1

The train covers 300m in 24 seconds.

If we divide 300 by 24

300/24 = 12.5m/sec

We have to convert this to per hour,

We can do that by multiplying 12.5 by 18/5

12.5 x 18/5

12.5 x 3.6

45 km/hr

The answer is (1) 45 km/hr

Answer 2

Step-by-step explanation:

• Here, Distance = 300m
• Time = 24 sec
• Speed = Distance / Time = 300/24 = 12.5 m/sec
• Now, 12.5 m/sec = 12.5*60*60/1000 = 125/10*36/10 = 25/2*18/5 = 5*9 = 45 km/hr
• Hence, option 1) 45km/hr