A person travels from city A to city B at 50 km/h and returns at 70 km/h. What is his average speed for the round trip? MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Time Speed and Distance Questions
Question #1
Report Error
A boat can row 11 km/h in still water and the velocity index of the current stream is 3 km/h. Find the time span taken to row 32 km upstream.
Correct Answer: Option C
Explanation:
Upstream speed = 11 - 3 = 8 km/h. Time taken = 32 / 8 = 4 hours.
Upstream speed = 11 - 3 = 8 km/h. Time taken = 32 / 8 = 4 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
Report Error
A thief escapes at 4:00 AM at 45 km/h. The police pursue him starting at 5:00 AM at 60 km/h. At what time will the thief be apprehended?
Correct Answer: Option A
Explanation:
By 5:00 AM, the thief has traveled for 1 hour and covered 45 km. Relative speed = 60 - 45 = 15 km/h. Time taken to catch = 45 / 15 = 3 hours. Capture time = 5:00 AM + 3 hours = 8:00 AM.
By 5:00 AM, the thief has traveled for 1 hour and covered 45 km. Relative speed = 60 - 45 = 15 km/h. Time taken to catch = 45 / 15 = 3 hours. Capture time = 5:00 AM + 3 hours = 8:00 AM.
This question belongs to:
Maths
Time Speed and Distance
Question #3
Report Error
The ratio between the speeds of two trains is 7:8. If the second train runs 400 km in 4 hours, then the speed of the first train is:
Correct Answer: Option D
Explanation:
Speed of second train = 400 / 4 = 100 km/h. Ratio is 7:8, so 8 parts = 100 km/h. 1 part = 12.5 km/h. First train speed = 7 parts = 7 * 12.5 = 87.5 km/h.
Speed of second train = 400 / 4 = 100 km/h. Ratio is 7:8, so 8 parts = 100 km/h. 1 part = 12.5 km/h. First train speed = 7 parts = 7 * 12.5 = 87.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
No comments yet. Be the first to start the discussion!