Selected MCQ

Current Question
Jameel completes a task in 15 hours and Nasir in 10 houRs. Together they finish in ____.
  • A. 12:00 pm
  • B. 2:00 am
  • C. 12:00 am
  • D. 10:00 pm
Correct Answer: C
Explanation:
Combined rate gives time ≈ 6 hours → midnight.
Related Question 1
A can do work 3 times faster than B. If together they finish in 32 hours, how long does A take alone?
  • A. 32 hours
  • B. 48 hours
  • C. 3 days
  • D. 4 days
Correct Answer: A
Explanation:
Work ratio simplifies to A alone time.
Related Question 2
P lays railway track in 16 days. Q does the same in 24 days. Together they finish in ____.
  • A. 9⅗ days
  • B. 9⅕ days
  • C. 9⅖ days
  • D. 10 days
Correct Answer: A
Explanation:
The combined rate yields 9⅗ days.
Related Question 3
A alone finishes work in 10 days, B in 15 days if they work together, total days ____.
  • A. 35
  • B. 40
  • C. 45
  • D. None
Correct Answer: C
Explanation:
Combined work rate.
Related Question 4
Pipes A, B, C fill tank in 12, 15, 20 houRs. Find time together.
  • A. 6 hours
  • B. 6⅔ hours
  • C. 7 hours
  • D. 7½ hours
Correct Answer: C
Explanation:
Combined rate method.
Related Question 5
Three pipes, A, B, and C, fill the tank in 30, 20, and 15 minutes, respectively. Together they fill in ____.
  • A. 5/11
  • B. 6/11
  • C. 7/11
  • D. 8/11
Correct Answer: B
Explanation:
Combined rate calculation.