Excluding stoppages, a bus travels at 60 km/h and including stoppages it travels at 50 km/h. How many minutes does the bus stop per hour? MCQ with Answer and Explanation

Question

Excluding stoppages, a bus travels at 60 km/h and including stoppages it travels at 50 km/h. How many minutes does the bus stop per hour?

A. 8 minutes

B. 12 minutes

C. 15 minutes

D. 10 minutes

Answer: Option D

Solution (By JKSSB Mock Tests)

Stoppage time per hour = (60 - 50) / 60 = 10 / 60 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A person walks from his house to office at 5 km/h and arrives 10 minutes late. If he walks at 6 km/h, he arrives 4 minutes late. Find the distance.

A. 3.5 km

B. 2.5 km

C. 4.0 km

D. 3.0 km

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Correct Answer: Option D

Explanation:
Time difference = 10 - 4 = 6 minutes = 6/60 = 0.1 hours. Let distance be d. d / 5 - d / 6 = 0.1 => d / 30 = 0.1 => d = 3 km.

This question belongs to: Maths Time Speed and Distance

Question #2

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A person covers a distance of 100 km at 25 km/h and another 150 km at 50 km/h. Find his average speed for the whole journey.

A. 38.25 km/h

B. 35.5 km/h

C. 37.50 km/h

D. 35.71 km/h

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Correct Answer: Option D

Explanation:
Total distance = 100 + 150 = 250 km. Total time taken = 100/25 + 150/50 = 4 + 3 = 7 hours. Average speed = 250 / 7 = 35.71 km/h.

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Question #3

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A boatman rows 16 km downstream in 2 hours and covers the same distance upstream in 4 hours. Find the speed of the boat in still water.

A. 8 km/h

B. 7 km/h

C. 5 km/h

D. 6 km/h

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Correct Answer: Option D

Explanation:
Downstream speed = 16 / 2 = 8 km/h. Upstream speed = 16 / 4 = 4 km/h. Speed in still water = (8 + 4) / 2 = 6 km/h.

This question belongs to: Maths Time Speed and Distance

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