Two trains 150 meters and 100 meters long are running along parallel tracks in the same direction at speeds of 56 km/h and 46 km/h respectively. In what time will the faster train cross the slower train completely? MCQ with Answer and Explanation
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Question #1
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A boat can row 18 km/h in still water and the speed of the current is 2 km/h. Find the time taken to row 80 km downstream.
Correct Answer: Option C
Explanation:
Downstream speed = 18 + 2 = 20 km/h. Time taken = 80 / 20 = 4 hours.
Downstream speed = 18 + 2 = 20 km/h. Time taken = 80 / 20 = 4 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Excluding operational corridor stops, the speed of an inter-provincial bus is 60 km/h, and including stops it tracks at 48 km/h. How many minutes does it stop per hour?
Correct Answer: Option B
Explanation:
Stoppage time per hour = (60 - 48) / 60 = 12 / 60 = 1/5 hour. In minutes = (1/5) * 60 = 12 minutes.
Stoppage time per hour = (60 - 48) / 60 = 12 / 60 = 1/5 hour. In minutes = (1/5) * 60 = 12 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A swimmer registers 12 km upstream and 24 km downstream, taking 3 hours for each leg of the trials. Find the speed of the current stream.
Correct Answer: Option D
Explanation:
Upstream speed = 12 / 3 = 4 km/h. Downstream speed = 24 / 3 = 8 km/h. Speed of current = (Downstream speed - Upstream speed) / 2 = (8 - 4) / 2 = 4 / 2 = 2 km/h.
Upstream speed = 12 / 3 = 4 km/h. Downstream speed = 24 / 3 = 8 km/h. Speed of current = (Downstream speed - Upstream speed) / 2 = (8 - 4) / 2 = 4 / 2 = 2 km/h.
This question belongs to:
Maths
Time Speed and Distance
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