Two trains of lenths 120 m and 90 m are running with speed of 80 km/hr and 55 km/hr respectively towards each other on parallel lines. If they are 90 m apart, after how many seconds they will cross each other?

• ক 7.2 sec
• খ 5.6 sec
• গ 8 sec ✅ সঠিক উত্তর
• ঘ 9 sec