Selected MCQ

Current Question
Two people work together. One types 32 pages in 6 hRs. Time to complete 100 pages is ____.
  • A. 7 hr 15 min
  • B. 7 hr 30 min
  • C. 8 hr 15 min
  • D. 8 hr 30 min
Correct Answer: C
Explanation:
The rate method gives 8 hr 15 minutes.
Related Question 1
P completes work in 24 days, Q in 9 days, R in 12 days. Time taken together is ____.
  • A. 10
  • B. 9
  • C. 11
  • D. 12
Correct Answer: A
Explanation:
Sum of rates gives time = 10 days.
Related Question 2
P and Q complete work in 20 and 12 days. Time together is ____.
  • A. 5 days
  • B. 10 days
  • C. 15 days
  • D. 12 days
Correct Answer: B
Explanation:
The combined rate gives 10 days.
Related Question 3
If Q alone does work in 12 days and P is twice as fast, time together is ____.
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Correct Answer: D
Explanation:
The combined rate gives 4 days.
Related Question 4
If P works alone takes same time as Q and R together, time taken by P is ____.
  • A. 30 days
  • B. 25 days
  • C. 20 days
  • D. 15 days
Correct Answer: B
Explanation:
Based on the equality of work rates.
Related Question 5
P and Q complete work in 8 days, Q and R in 12 days. Time for all three is ____.
  • A. 7
  • B. 8
  • C. 9
  • D. 10
Correct Answer: B
Explanation:
Combined work rate leads to 8 days.