Selected MCQ

Current Question
A man walks around a circular field once per hour. At what time will he complete a round if he starts at 7:42 a.m.?
  • A. 7:42 a.m.
  • B. 7:48 a.m.
  • C. 8:10 a.m.
  • D. 8:30 a.m.
Correct Answer: A
Explanation:
One full round takes exactly 1 hour, so the time remains the same format.
Related Question 1
Three men walk around a circular track of 11 km. Find a time for them to meet again.
  • A. 11 hours
  • B. 12 hours
  • C. 220 hours
  • D. 22 hours
Correct Answer: A
Explanation:
LCM of time intervals.
Related Question 2
A, B, and C start running around a circular track. When do they meet again?
  • A. 26 min 18 sec
  • B. 42 min 36 sec
  • C. 45 min
  • D. 46 min 12 sec
Correct Answer: D
Explanation:
LCM of times.
Related Question 3
A rectangular grass field 75 m × 55 m has a path of width 2.5 m all around. Find the area and cost.
  • A. 675, Rs. 1350
  • B. 575, Rs. 1350
  • C. 1350, Rs. 675
  • D. None
Correct Answer: A
Explanation:
Path area computed from outer minus inner rectangle.
Related Question 4
Pipes A, B, C fill tank in 12, 15, 20 houRs. If A alone works, time required is ____.
  • A. 6 hrs
  • B. 6⅔ hrs
  • C. 7 hrs
  • D. 7½ hrs
Correct Answer: C
Explanation:
Based on the given combination.
Related Question 5
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.