Arithmetic Aptitudes › Time and Distance › Question #4698
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QA bicycle cycles at 10 kilometres per hour for two hours and then at 13 kilometres per hour for one hour. Determine his average speed.

ID: #4698 Time and Distance 179 views
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#4698Q ID
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Time and DistanceTopic
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  • A 11 kmph ✔ ✖
  • B 21 kmph ✔ ✖
  • C 54 kmph ✔ ✖
  • D 22 kmph ✔ ✖
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Explanation


Distance traveled in first 2 hours = speed * time = 10 km/hr * 2 hours = 20 km

Distance traveled in next 1 hour = speed * time = 13 km/hr * 1 hour = 13 km

Total distance traveled = distance traveled in first 2 hours + distance traveled in next 1 hour = 20 km + 13 km = 33 km

Total time taken = time taken in first 2 hours + time taken in next 1 hour = 2 hours + 1 hour = 3 hours

Average speed = total distance traveled/total time taken = 33 km/ 3 hours = 11 km/hr.
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