A courier driver logs 3 hours at 50 km/h and the next 2 hours at 60 km/h. Find the combined average speed. MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Time Speed and Distance Questions
Question #1
Report Error
A cross-country runner covers the sides of an equilateral triangular course at speeds of 8 km/h, 12 km/h and 24 km/h respectively. Find his average speed for the whole round.
Correct Answer: Option C
Explanation:
Let each side of the triangular course be 24 km. Total perimeter = 3 * 24 = 72 km. Total time taken = 24/8 + 24/12 + 24/24 = 3 + 2 + 1 = 6 hours. Average speed = 72 / 6 = 12 km/h.
Let each side of the triangular course be 24 km. Total perimeter = 3 * 24 = 72 km. Total time taken = 24/8 + 24/12 + 24/24 = 3 + 2 + 1 = 6 hours. Average speed = 72 / 6 = 12 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
Report Error
An athlete loops a circular running stadium of radius 70 meters in exactly 44 seconds. Find the average moving speed.
Correct Answer: Option C
Explanation:
Circumference = 2 * (22/7) * 70 = 440 meters. Speed = Distance / Time = 440 / 44 = 10 m/s.
Circumference = 2 * (22/7) * 70 = 440 meters. Speed = Distance / Time = 440 / 44 = 10 m/s.
This question belongs to:
Maths
Time Speed and Distance
Question #3
Report Error
A man walks from his sector quarters to a focal workshop at 4 km/h and arrives 15 minutes late. If he scales his speed to 6 km/h, he arrives 5 minutes early. Find the distance.
Correct Answer: Option D
Explanation:
Time difference = 15 - (-5) = 20 minutes = 20/60 = 1/3 hours. Let distance be d. d/4 - d/6 = 1/3 => d/12 = 1/3 => d = 4 km.
Time difference = 15 - (-5) = 20 minutes = 20/60 = 1/3 hours. Let distance be d. d/4 - d/6 = 1/3 => d/12 = 1/3 => d = 4 km.
This question belongs to:
Maths
Time Speed and Distance
No comments yet. Be the first to start the discussion!