A train runs at a speed of 54 km/h when it does not stop. However, its average…
2025
A train runs at a speed of 54 km/h when it does not stop.
However, its average speed becomes 45 km/h when stoppage time is included.
Find how many minutes in one hour the train remains stopped.
- A.
46 minutes
- B.
48 minutes
- C.
10 minutes
- D.
56 minutes
Attempted by 738 students.
Show answer & explanation
Correct answer: C
Step 1: Interpret the speeds and the 1-hour period.
Running (no stoppage) speed = 54 km/h.
Average speed with stoppages = 45 km/h, so in one hour the train covers 45 km (including stops).
Step 2: Find how long the train is actually moving in that hour.
Time spent moving = distance travelled (with stoppage) ÷ running speed = 45 km ÷ 54 km/h = 45/54 hours = 5/6 hours = 50 minutes.
Step 3: Find stopped time in one hour.
Stopped time = 60 minutes − running time = 60 − 50 = 10 minutes.
Answer: The train stops for 10 minutes in one hour.
Note: The original solution image shows the calculation that yields 50 minutes, which is the running time. The question asks for stopping time, so the correct stopping time is 10 minutes. None of the provided options list 10 minutes.