Quantitative Aptitude

1.  The average marks in Math subject of a class of 32 students is 72. If the marks of two students were
misread as 66 and 72 in place of 74 and 82 respectively, then what would be the correct average
(upto two decimal place)?           (3)

1. 1.  68.52
2. 2.  69.56
3. 3.  72.56
4. 4.  74.65
5. 5.  66.54

2.  The total marks obtained by a student in History, Psychology and Geography together is 140 more than the marks obtained by him in Psychology. What are the average marks obtained by him in History and Geography together?              (1)

1. 1.  70
2. 2.  65
3. 3.  68
4. 4.  Cannot be determined
5. 5.  None of these

3.  Raghu’s present age is two times his son’s present age and three fifth of his father’s present age.
The average of the present age of all of them is 38 years. What is the difference between Raghu’s son’s
present age and Raghu’s father’s present age?                (2)

1. 1.  48years
2. 2.  42 years
3. 3.  52 years
4. 4.  Cannot be determined
5. 5.  None of these

4.  A boatman can row his boat at 16 km/h in still water. He rows from a point A to B upstream and returns from B to A downstream in a total time of 8 hours. If distance between A to B is 48 km, what is the speed of stream?                                                                            (1)

1. 1.  8 km/h
2. 2.  4 km/h
3. 3.  6 km/h
4. 4.  3 km/h
5. 5.  None of these

5.  The ratio of length of a rectangle and height of a cylinder is 3 : 4 and also ratio of breadth of rectangle and diameter of cylinder is 1:2. The ratio of length to breadth of rectangle is 3:1.If perimeter of rectangle is 112 m then what is the volume of cylinder?                                 (3)

1. 1.  32,596 metre cube
2. 2.  38,286 metre cube
3. 3.  34,496 metre cube
4. 4.  28,896 metre cube
5. 5.  None of these