2. At what % annual compound interest rate, a certain sum amounts to its 27 times in 3 yr ? 100 % 150 % 200 % 75 %
3. A certain distance is covered at a certain speed . If half of this distance is covered in double the time, the ratio of the two speed is 1 : 4 1 : 2 4 : 1 2 : 1
4. The ratio between the ages of A and B is 3:5 and sum of their ages is 56 yr. The ratio between their ages 7 years ago was 3 : 4 3 : 5 1 : 2 2 : 3
5. A, B and C together start a business. B invests 1/6 of the total capital while investments of A and C are equal . if the annual profit on this investment is Rs. 33600 , find the difference between the profits of B & C. 8400 7200 6000 9600
6. A takes twice the time taken by B and thrice the time taken by C to do a particular piece of work. Working together, they can complete the work in 2 days. Find the number of days taken by A, B and C respectively to complete the work alone. 12, 6 and 4 18, 9 and 6 24, 12 and 8 6, 3 and 2
7. Two pipes X and Y can fill a cistern in 6 and 7 min, respectively. Starting with pipe X both the pipes are opened alternately each for 1 min. In what time will they fill the cistern? 6 2/7 min 6 3/7 min 6 5/7 min 6 1/7 min
8. A takes 4 h more than the time taken by B to walk D km. If A doubles his speed , he can make it in 2 h less than that of B. How much time does B require for walking D km? 8 h 4 h 6 h 9 h
9. Two trains are running 40 km/hr and 20 km/hr respectively in the same direction. The fast train completely passes a man sitting in the slow train in 5 sec . The length of the fast train is 23 2/9 m 27 m 27 7/9 m 23 m
10. A boat goes 12 km in 1 h in still water. It takes thrice time in covering the same distance against the current. Find the speed of the current. 8 km/h 12 km/h 6 km/h 7 km/h
Score = Correct answers:
