Excluding regular route passenger stops, the speed of an express coach is 64 km/h and including stops it is 48 km/h. For how many minutes does the coach stop per hour? MCQ with Answer and Explanation
Excluding regular route passenger stops, the speed of an express coach is 64 km/h and including stops it is 48 km/h. For how many minutes does the coach stop per hour?
A. 15 minutes
B. 20 minutes
C. 12 minutes
D. 18 minutes
Answer: Option A
Solution (By JKSSB Mock Tests)
Stoppage time per hour = (64 - 48) / 64 = 16 / 64 = 1/4 hour. In minutes = (1/4) * 60 = 15 minutes.
The speed of a boat in still water is 14 km/h and the speed of the current is 4 km/h. How much time will the boat take to cover a distance of 72 km downstream?
Explanation:
Downstream speed = Speed in still water + Speed of current = 14 + 4 = 18 km/h. Time taken = Distance / Downstream speed = 72 / 18 = 4 hours.
A car travels a distance of 240 km at a certain speed. If the speed is increased by 10 km/h, it takes 4 hours for the journey. Find the original speed.
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