[Food Safety Officer, 2020]

6. How many litres of water should be added to a 30 litre mixture of milk and water containing milk and water in the ratio of 7:3 such that the resultant mixture has 40% water in it?

[Food Safety Officer, 2020]

7. The compound interest on a certain sum of money for 2 years at 10% per annum is Rs.525. The simple interest on the same sum of money for double the time at half the rate percent per annum is:

[Food Safety Officer, 2020]

8. The cost of fencing a square field @Rs.20 per metre is Rs.10080. How much will it cost to lay a three metre wide pavement along the fencing inside the field @ Rs.50 per sq.metre?

[Food Safety Officer, 2020]

9. The cost of painting the whole surface area of a cube at the rate of 13 paise per sq.cm is Rs. 343.98. Then the volume of the cube is:

[Food Safety Officer, 2020]

10. If a 30 m ladder is placed against a 15 m wall such that it just reaches the top of the wall, then the elevation of the ladder with the wall is equal to: