- A78 km/h
- B78.3 km/h
- C80 km/h
- D76 km/h
Step-by-Step Solution
Distances: 150 + 135 + 105 = 390 km. Times: 2 + 1.5 + 1.5 = 5 h. Average km/h. (78.3 is the plain mean of the three speeds.)
Answer: A) 78 km/h
A train runs for 2 h at 75 km/h, then for 1.5 h at 90 km/h, and covers the last 105 km at 70 km/h. What is its average speed for the whole trip?
Competition practiceProblems on Trains
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Problems on Trains practice questions
More Problems on Trains practice
An express runs 25% faster than a car. Both leave Delhi together for Chandigarh, 250 km…Two goods trains, each 500 m long, run in opposite directions on parallel tracks at 45…Train X leaves Meerut at 4 p.m. and reaches Ghaziabad at 5 p.m. Train Y leaves Ghaziabad…After running 50 km a train has an engine fault and continues at three-fourths of its…A train arrives 9 minutes late if it runs at 50 km/h and 24 minutes late if it runs at…