91
Q:

# How many kilograms of sugar costing Rs. 9 per kg must be mixed with 27 kg of sugar costing Rs. 7 per Kg so that there may be a gain of 10 % by selling the mixture at Rs. 9.24 per Kg ?

 A) 36 Kg B) 42 Kg C) 54 Kg D) 63 Kg

Explanation:

By the rule of alligation:

C.P. of 1 kg sugar of 1st kind      C.P. of 1 kg sugar of 2nd kind Therefore, Ratio of quantities of 1st and 2nd kind = 14 : 6 = 7 : 3.

Let x kg of sugar of 1st kind be mixed with 27 kg of 2nd kind.

Then, 7 : 3 = x : 27 or x = (7 x 27 / 3) = 63 kg.

Q:

In what ratio should coffee powder costing Rs 2500/kg be mixed with coffee powder costing Rs 1500/kg so that the cost of the mixture is Rs 2250/kg?

 A) 1 : 4 B) 4 : 1 C) 3 : 1 D) 1 : 3

Explanation:

5 274
Q:

Solution A contains 10% acid and solution B contains 30% acid. In what ratio should solution A be mixed with Solution B to obtain a mixture with 25% acid?

 A) 1 : 2 B) 3 : 1 C) 1 : 3 D) 2 : 1

Explanation:

1 227
Q:

The ratio of milk and water in three samples is 1 : 3, 3 : 5 and 11 : 5. A mixture containing equal quantities of all three samples is made. What will be the ratio of milk and water in the new mixture?

 A) 7 : 9 B) 5 : 7 C) 15 : 13 D) 9 : 11

Explanation:

4 414
Q:

A mixture is composed of 11 parts of pure milk and 2 parts of water. If 35 litres of water were added to the mixture then the new mixture will contain twice as much pure milk as water, then how many litres of pure milk does the original mixture contain?

 A) 110 B) 55 C) 220 D) 70

Explanation:

0 423
Q:

A beaker contains acid and water in the ratio 1 : x. When 300 ml of the mixture and 50 ml of water are mixed, the ratio of acid and water becomes 2 : 5. What is the value of x?

 A) 2 B) 1 C) 3 D) 4

Explanation:

1 516
Q:

In what ratio should tea costing Rs 300/kg be mixed with tea costing Rs 200/kg so that the cost of the mixture is Rs 225/kg?

 A) 3 : 1 B) 1 : 3 C) 1 : 4 D) 4 : 1

Explanation:

2 280
Q:

If a dairy mixes cow's milk which contains 10% fat with buffalo's milk which contains 20% fat, then the resulting mixture has fat (120/7)% of fat. What ratio was the cow's milk mixed with buffalo's milk?

 A) 2 : 5 B) 1 : 5 C) 2 : 3 D) 2 : 1

Explanation:

4 283
Q:

An alloy is made by mixing metal A costing Rs 2000/kg and metal B costing Rs 400/kg in the ratio A:B = 3:1. What is the cost (in Rs) of 8 kilograms of this alloy?

 A) 1600 B) 9800 C) 6400 D) 12800