In how many seconds will a 120-meter-long train traveling at a speed of 60 km/h cross a 180-meter-long bridge?
Show answer & explanation
Correct answer: D
Explanation
Speed = 60 × 5/18 = 50/3 m/s
Total distance = 120 + 180 = 300 meters
Time = 300 ÷ (50/3) = 18 seconds