Quantitative Aptitude

1. There is a certain amount of which A takes 30% then B takes 60% of the remaining amount, then C takes 80% of the remaining amount. Now if the amount left is 2,536.8 then what is the actual sum?                         (1)

1. (1) Rs. 45,300
2. (2) Rs. 45,500
3. (3) Rs. 42,600
4. (4) Rs. 48,400
5. (5) None of these

2. In a class there are 60 boys whose average age is decreased by 1.5 months, when 1 boy aged 25 years is replaced by a new boy. Find the age of the new boy.                                                                   (3)

1. (1) 16 years
2. (2) 15 years
3. (3) 17.5 years
4. (4) 19 years
5. (5) None of these

3. Two vessels A and B contains milk and water mixed in the ratio 9:8 and 4:3 respectively. The ratio in which these two mixture be mixed to get a new mixture containing 800/17% milk is                                          (2)

1. (1) 13:5
2. (2) 12:7
3. (3) 11:7
4. (4) 12:5
5. (5) None of these

4. What will be the total surface area of a solid cone having diameter and height 14 m and 24 m respectively ? (take π = 22/7)                                                                                                             (3)

1. (1) 710
2. (2) 708
3. (3) 704
4. (4) 720
5. (5) None of these

5. There are 8 filling pipes each capable of filling a cistern alone in 26 minutes and 6 emptying pipes each capable of emptying a cistern alone in 24 minutes. All pipes are opened together and as a result, tank fills 27 litres of water per minute. Find the capacity of the tank.                                                                 (4)

1. (1) 445 l
2. (2) 458 l
3. (3) 460 l
4. (4) 468 l
5. (5) None of these