A. 11 hours
B. 12 hours
C. 220 hours
D. 22 hours
Related Mcqs:
- A and B walk around a circular track. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. If they start at 8 a.m. from the same point in opposite directions, how many times shall they cross each other before 9.30 a.m.?
A. 5
B. 6
C. 7
D. 8 - A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting point?
A. 26 min 18 sec
B. 42 min 36 sec
C. 45 min
D. 46 min 12 sec - A walks around a circular field at the rate of one round per hour while B runs around it at the rate of six rounds per hour. They start in the same direction from the same point at 7.30 a.m. They shall first cross each other at :___________?
A. 7.42 a.m.
B. 7.48 a.m.
C. 8.10 a.m.
D. 8.30 a.m. - Two bikes start at the same time from two destination 300 km apart and travel towards each other. If they cross each other at a distance of 130 km from one of the destination, what is the ratio of their speeds?
A. 17:13
B. 17:30
C. 13:30
D. None of these - The wheels revolve round a common horizontal axis. They make 15, 20 and 48 revolutions in a minute respectively. Starting with a certain point on the circumference down wards. After what interval of time will they come together in the same position?
A. 1 min
B. 2 min
C. 3 min
D. None - At 10 a.m. two trains started traveling toward each other from stations 287 miles apart. They passed each other at 1:30 p.m. the same day. If the average speed of the faster train exceeded the average speed of the slower train by 6 miles per hour, which of the following represents the speed of the faster train, in miles per hour?
A. 38
B. 40
C. 44
D. 48 - Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the proportion of solution R in the liquid in the tank after 3 minutes?
A. 5/11
B. 6/11
C. 7/11
D. 8/11 - A can give B 100 meters start and C 200 meters start in a kilometer race. How much start can B give C in a kilometer race?
A. 111.12 m
B. 888.88 m
C. 777.52 m
D. 756.34 m - A lorry covers a distance of 100 km in 2 hours 30 minutes. A car runs with a speed of 55 km/hour. Determine the ratio of their speeds.
A. 8:11
B. 20:11
C. 4:11
D. None of These - Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet?
A. 2.5
B. 2.0
C. 1.75
D. 1.5
E. 1.25Submitted by: Mansoor Ul Haque
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2 Comments
WE NEED THE FORMULA. HOW DID 11 HOURS CAME.
11/4, 11/5,11/8 now we should need to take the LCM OF 11, 11, 11 and 11 is the answer