A car covers a distance of 120 km at 30 km/h and another 120 km at 50 km/h. Find the total time spent during the journey. MCQ with Answer and Explanation
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Question #1
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Excluding stoppages, the speed of an intercity bus is 54 km/h and including stoppages it is 45 km/h. How many minutes does the bus stop per hour?
Correct Answer: Option A
Explanation:
Stoppage time per hour = (54 - 45) / 54 = 9 / 54 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
Stoppage time per hour = (54 - 45) / 54 = 9 / 54 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A car runs at 50 km/h for 3 hours and then tracks at 70 km/h for the next 2 hours. Find the average speed across the whole route.
Correct Answer: Option B
Explanation:
Distance 1 = 50 * 3 = 150 km. Distance 2 = 70 * 2 = 140 km. Total distance = 290 km. Total time = 5 hours. Average speed = 290 / 5 = 58 km/h.
Distance 1 = 50 * 3 = 150 km. Distance 2 = 70 * 2 = 140 km. Total distance = 290 km. Total time = 5 hours. Average speed = 290 / 5 = 58 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A person walks from home to school at 4 km/h and arrives 5 minutes late. If he runs at 5 km/h, he arrives 4 minutes early. Find the distance.
Correct Answer: Option A
Explanation:
Time difference = 5 - (-4) = 9 minutes = 9/60 = 0.15 hours. Let distance be d. d / 4 - d / 5 = 0.15 => d / 20 = 0.15 => d = 3 km.
Time difference = 5 - (-4) = 9 minutes = 9/60 = 0.15 hours. Let distance be d. d / 4 - d / 5 = 0.15 => d / 20 = 0.15 => d = 3 km.
This question belongs to:
Maths
Time Speed and Distance
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