1. A and B can complete a piece of work in 15 days, B and C in 24, and C and A in 30 days. Calculate the number of days required by A alone to complete ¾ th of the work. (1)
- 1. 180/7
- 2. 240/7
- 3. 270/7
- 4. 220/7
- 5. None of these
2. The average age of 20 students in a class is 20 years. If the age of teacher is added the average age increases by 2 years, find the age of the teacher (in years). (4)
- 1. 64
- 2. 66
- 3. 68
- 4. 62
- 5. None of these
3. The sum of the area of a square and a rectangle is 150 cm². If length of rectangle is same as the side of the square and breadth is half of length. Find the side of square. (1)
- 1. 10 cm
- 2. 11 cm
- 3. 12 cm
- 4. 13 cm
- 5. None of these
4. The time required by boat to go downstream is half of the time required to go upstream. Find the ratio of speed of boat to speed of stream. (1)
- 1. 3 : 1
- 2. 4 : 1
- 3. 5 : 1
- 4. 6 : 1
- 5. 7 : 1
5. The ratio of CI to SI for a fixed amount is 43 : 40 for two year. Calculate the rate of interest. (1)
- 1. 15
- 2. 18
- 3. 20
- 4. 12
- 5. None of these