E-PolyLearning

1. A vessel is filled with liquid, 3 parts of which are water and 5 parts syrup. How much of the mixture must be drawn off and replaced with water so that the mixture may be half water and half syrup?
a. 1/3
b. 1/4
c. 1/5
d. 1/7
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Answer: (c).1/5

2. Tea worth Rs. 126 per kg and Rs. 135 per kg are mixed with a third variety in the ratio 1 : 1 : 2. If the mixture is worth Rs. 153 per kg, the price of the third variety per kg will be:
a. Rs. 169.50
b. Rs. 170
c. Rs. 175.50
d. Rs. 180
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Answer: (c).Rs. 175.50

3. A can contains a mixture of two liquids A and B is the ratio 7 : 5. When 9 litres of mixture are drawn off and the can is filled with B, the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained by the can initially?
a. 10
b. 20
c. 21
d. 25
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Answer: (c).21

4. A milk vendor has 2 cans of milk. The first contains 25% water and the rest milk. The second contains 50% water. How much milk should he mix from each of the containers so as to get 12 litres of milk such that the ratio of water to milk is 3 : 5?
a. 4 litres, 8 litres
b. 6 litres, 6 litres
c. 5 litres, 7 litres
d. 7 litres, 5 litres
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Answer: (b).6 litres, 6 litres

5. In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16.50 kg?
a. 3 : 7
b. 5 : 7
c. 7 : 3
d. 7 : 5
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Answer: (c).7 : 3

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