Two trains moving in same direction run at a speed of 60 km/hr and 40 km/hr respectively. If a man sitting in slow train is passed by the fast train in 10 seconds, then what is the length of the faster train?

• ক 55.6 m ✅ সঠিক উত্তর
• খ 57.2 m
• গ 53.2 m
• ঘ 53.7 m