Arithmatic MCQ Question and Answer
Arithmatic MCQ Question and Answer
21. The ratio of the speeds of two trains is 7 : 8. If the second train runs 400 kms in 4 hours, then the speed of the first train is—
- 70 km/hr
- 75 km/hr
- 84 km/hr
- 87•5 km/hr
22. In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is—
- 29years
- 19 years
- 49 years
- 39 years
23. Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternately, the tank will be full in—
- 6 hours
- 6 2/3 hours
- 7 hours
- 7 ½ hours
24. The present ages of three persons are in proportions 4 : 7 : 9. Eight years ago, the sum of their ages was 56. Find their present ages (in years)—
- 20, 35, 45
- 8, 20, 28
- 16, 28, 36
- 20, 36, 46
25. Which is common between aerobic respiration and anaerobic respiration ?
- Similar substrate
- Glycolysis
- Pyruvic acid
- All of these
26. The diagonal of a square is 4√ 2 cm. The diagonal of another square whose area is double that of the first square is—
- 8 cm
- 8√2 cm
- 4√ 2 cm
- 16 cm
27. A train starts with the speed of 70 km/hr with its speed increasing every two hours by 10 km/hr. In how many hours will it cover 345 kms ?
- 2¼ hrs
- 4 hrs 5 mins
- 4½ hrs
- None of the above
28. How long does a train 110 metres long running at the speed of 72 km/hr take to cross a bridge 132 metres in length ?
- 9•8 sec
- 12•1 sec
- 12•42 sec
- 14•3 sec
29. A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water ?
- 40 mins
- 1 hr
- 1 hr 15 mins
- 1 hr 30 mins
30. The ratio of the incomes of A and B is 5 : 4 and the ratio of their expenditure is 3 : 2. If at the end of each year, each saves Rs. 1600, then the income of A is—
- Rs. 3400
- Rs. 3600
- Rs. 4000
- Rs. 4400