Selected MCQ

Current Question
In a kilometer race, A beats B by 50 m or 10 seconds. What is A’s time?
  • A. 200 sec
  • B. 190 sec
  • C. 210 sec
  • D. 150 sec
Correct Answer: B
Explanation:
The ratio method gives A’s time as 190 sec.
Related Question 1
In a 300 m race, A beats B by 22.5 m or 6 seconds. What is B’s time?
  • A. 86 sec
  • B. 80 sec
  • C. 76 sec
  • D. None of these
Correct Answer: B
Explanation:
The ratio method gives B’s time as 80 sec.
Related Question 2
In a 1000 m race, A beats B by 100 m. In an 800 m race, B beats C by 100 m. By how much does A beat C?
  • A. 57.5 m
  • B. 127.5 m
  • C. 150.7 m
  • D. 98.6 m
Correct Answer: B
Explanation:
Using the proportional race method gives 127.5 m.
Related Question 3
In a 100 m race, A beats B by 25 m and B beats C by 4 m. By how much does A beat C?
  • A. 21 m
  • B. 26 m
  • C. 28 m
  • D. 29 m
Correct Answer: C
Explanation:
Using the proportional speed relation gives 28 m.
Related Question 4
Two boys walk at 5 km/h and 5.5 km/h. Time difference after same distance is ____.
  • A. 17 hr
  • B. 14 hr
  • C. 12 hr
  • D. 19 hr
Correct Answer: A
Explanation:
Relative speed difference.
Related Question 5
Two automobiles 150 km apart move toward each other. Time to meet is ____.
  • A. 2.5 hr
  • B. 2 hr
  • C. 1.75 hr
  • D. 1.5 hr
Correct Answer: D
Explanation:
Relative speed method.