A.10 liters

B.20 liters

C.15 liters

D.25 liters

E.None of these

2) A mixture contains oil and water in the ratio of 5:3. If 120 liters of mixture is taken out and 25 liters of oil and 5 liters of water is added in the remaining mixture, then the ratio of the oil to water becomes 2:1. Find the initial quantity of mixture?

A.160 liters

B.200 liters

C.240 liters

D.280 liters

E.320 liters

3) The price of A1 quality rice is Rs.70 per kg and the price of A2 quality rice is Rs.45 per kg. If both quality of rice are mixed in the ratio of 9:11, then what is the price per kg of the mixture?

A.Rs.58.75

B.Rs.56.80

C.Rs.54.75

D.Rs.52.90

E.Rs.50.45

4) A Jar contains 40 liters of pure milk. If 4 liters of milk is taken out and replaced by water and this process is repeated two more times, then find the quantity of milk in the final mixture?

A.28.17 liters

B.29.16 liters

C.30.19 liters

D.32.46 liters

E.None of these

5) A mixture contains 60 liters of oil and rest is water and the oil which contains 75% of the mixture. If x liters of water and 10 liters of oil is added to the mixture, then the quantity of oil in the resultant mixture is double of water. Find the value of x?

A.10

B.15

C.20

D.18

E.8

Answers :

1) Answer: B

Milk = 2/3 * 180 = 120Liters

Water = 180 – 120 = 60Liters

120 = (180 + x) * 60%

12000=10800+60x

1200=60x

=> x = 20 Liters

2) Answer: C

Initial quantity = 8x

Oil = 5x

Water = 3x

Oil in 120 liters = 120 * 5/8 = 75 liters

Water in 120 liters = 120 * 3/8 = 45 liters

(5x – 75 + 25)/(3x – 45 + 5) = 2/1

6x – 80 = 5x – 50

x = 30

Initial quantity = 8 * 30 = 240 liters

3) Answer: A

(70 – x)/(x – 45) = 9/11

9x – 405 = 770 – 11x

20x = 1175

x = 58.75

4) Answer: B

Milk in the final quantity = 40 * (1 – 4/40)³

= 29.16 liters

5) Answer: B

Water = 60 * 25/75 = 20

(60 + 10)/(20 + x) = 2/1

40 + 2x = 70

x = 15