An express train travelled at an average speed of 100km/hr, stopping for 3 minutes after every 75km. How long did it take to reach its destination 600 km from the starting point?
সমাধান
সঠিক উত্তর: Option A
Normal time taken = 600/100 = 6 hr. stops = 600/75 – 1 = 8 – 1 = 7
subtracted 1 as at 600 km the last 8th stop. extra time = 7 × 3 = 21 minutes
