A person travels a distance of 24 km at a speed of 6 km/h, another 24 km at 8 km/h and a third 24 km at 12 km/h. Find his average speed for the whole journey. MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Time Speed and Distance Questions
Question #1
Report Error
If a delivery agent cycles at 15 km/h instead of 11 km/h, he travels 20 km more in the same allotted duration. Find the actual distance covered by him at his lower speed.
Correct Answer: Option B
Explanation:
Let the time duration be t hours. Distance difference = 15t - 11t = 4t = 20 km => t = 5 hours. Distance covered at lower speed = 11 * 5 = 55 km.
Let the time duration be t hours. Distance difference = 15t - 11t = 4t = 20 km => t = 5 hours. Distance covered at lower speed = 11 * 5 = 55 km.
This question belongs to:
Maths
Time Speed and Distance
Question #2
Report Error
A man covers half of his journey at 6 km/h and the remaining half at 3 km/h. Find his average speed.
Correct Answer: Option B
Explanation:
Average Speed = 2xy / (x + y) = (2 * 6 * 3) / (6 + 3) = 36 / 9 = 4 km/h.
Average Speed = 2xy / (x + y) = (2 * 6 * 3) / (6 + 3) = 36 / 9 = 4 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
Report Error
A thief is spotted by a policeman from a distance of 250 meters. The thief runs at 11 km/h and the policeman chases him at 13 km/h. Find the distance covered by the thief before he is caught.
Correct Answer: Option C
Explanation:
Relative speed = 13 - 11 = 2 km/h. Time to catch the thief = 0.25 km / 2 km/h = 0.125 hours. Distance covered by thief = Speed * Time = 11 km/h * 0.125 hours = 1.375 km = 1375 meters.
Relative speed = 13 - 11 = 2 km/h. Time to catch the thief = 0.25 km / 2 km/h = 0.125 hours. Distance covered by thief = Speed * Time = 11 km/h * 0.125 hours = 1.375 km = 1375 meters.
This question belongs to:
Maths
Time Speed and Distance
No comments yet. Be the first to start the discussion!