Mixtures

11 )

A salesman purchases two types of paneer at the rate of Rs. 280/kg and Rs. 260/kg. In 52 kg of the second type, how much paneer of the first type should be mixed so that by selling the resulting mixture at Rs.300/kg, he gains a profit of 25%?

12 )

If the average weight of the whole class is 50 kg. And the average weight of boys in the class is 30 kg and the average weight of girls in the same class is 22 kg. What could be the possible strength of boys and girls in the class respectively?

13 )

A man travels 200 km in 5 hours in two parts. In the first part of the journey, he travels by train at the speed of 50 km/hr. In the second part of the journey, he travels by bike at the speed of 30 km/hr. How much distance did he travel by bike?

14 )

Nikhil bought two different kinds of edible oil, one is rice bran oil and another is sunflower oil. There are two mixtures of these two oils. In the first mixture the ratio of the rice bran and sunflower oil is in the ratio of 3 : 4 and in the second mixture the ratio of the rice bran and sunflower oil is 5 : 6. If he mixes these two mixtures and makes a third mixture of 36 liters in which the ratio of the rice bran oil and sunflower oil is 4 : 5. Find the quantity of the second mixture that is needed to make 36 liters of third type of mixture.

15 )

A Container which contains 100 liters of alcohol and water solution in the ratio of 22 : 3. From the Container 40 liters of mixture is taken out and 4.8 liters of alcohol solution and water solution, both are added to the mixture. What is the percentage of the quantity of water solution in the final mixture less than the quantity of alcohol solution?