APTITUDE QUESTIONS AND ANSWERS 11 to 20
11. A sum was put at simple interest at a certain rate for 2 years. Had it been put at 1% higher rate. It would have fetched Rs. 24 more. The sum is: |
Rs. 600 |
Rs. 1200 |
Rs. 800 |
Rs. 480 |
12. A train crosses a platform 100 metres long in 60 seconds at a speed of 45 km per hour. The time taken by the train to cross an electric pole is: |
8 seconds |
1 minute |
52 seconds |
data inadequate |
13. In a class, there are 20 boys whose average age is decreased by 2 months, when one boy aged 18 years is replaced by a new boy. The age of the new boy is : |
14 years 8 months |
15 years |
16 years 4 months |
17 years 10 months |
14. 15 litres of a mixture contains 20% alcohol and the rest water. If 3 litres of water be mixed in it, the percentage of alcohol in the new mixture will be : |
17 |
16 |
18 |
15 |
15. A train 50 metres long passes a platform 100 metres long in 10 seconds The speed of the train is: |
10 km/hr |
15 km/hr |
54 km/hr |
100 km/hr |
16. A contract is to be completed in 56 days and 104 men were set to work, each working 8 hours a day. After 30 days, of the work is completed. How many additional men may be employed, so that the work may be compeleted in time, each man now working 9 hours a day ? |
60 |
56 |
70 |
42 |
17. The average of five results is 46 and that of the first four is 45. The fifth result is : |
1 |
10 |
12.5 |
50 |
18. A tap can fill a tank in 16 minutes and another can empty it in 8 minutes. If the tank is already half full, and both the taps are opened together, the tank will be: |
filled in 12 min |
emptied in 12 min |
filled in 8 min |
emptied in 8 min |
19. At a game of billiards A can give B 15 points in 60 and A can give C 20 in 60. How many can B give C in a game of 90? |
30 points |
20 points |
10 points |
12 points |
20. 729 ml. of a mixture contains milk and water in the ratio 7 : 2. How much more water is to be added to get a new mixture containing milk and water in ratio 7 : 3 ? |
600 ml. |
710 ml. |
520 m. |
none of these |
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