Ratio & Proportion Worksheet-5

Ratio & Proportion Worksheet-5

15 litres of mixture contains 20% alcohol and the rest water. If 3 litres of water be mixed with it, the percentage of alcohol in the new mixture would be:

(a) 15% (b) (c) 17% (d)

20 litres of a mixture contains milk and water in the ratio 5 : 3. If 4 liters of this mixture be replaced by 4 litres of milk, the ratio of milk to water in the new mixture would be:

(a) 2 : 1 (b) 7 : 3 (c) 8 : 3 (d) 4 : 3

85 kg of a mixture contains milk and water in the ratio 27 : 7. How much more water is to be added to get a new mixture containing milk and water in the ratio 3:1?

(a) 5 kg (b) 6.5 kg (c) 7.25 kg (d) 8 kg

The ages of A and B are in the ratio 3 : 1. Fifteen years hence, the ratio will be 2 : 1. Their present ages are:

(a) 30 years, 10 years (b) 45 years, 15 years

The average age of three boys is 25 years and their ages are in the proportion 3:5:7. The age of the youngest boy is:

(a) 21 years (b) 18 years (c) 15 years (d) 9 years

The speeds of three cars are in the ratio 5:4:6. The ratio between the time taken by them to travel the same distance is:

(a) 5 : 4 : 6 (b) 6 : 4 : 5 (c) 10 : 12 : 15 (d) 12 : 15 : 10

In a college, the ratio of the number of boys to girls is 8 : 5. If there are 160 girls, the total number of students in the college is:

(a) 100 (b) 250 (c) 260 (d) 416

The sides of a triangle are in the ratio and its perimeter is 104 cm. The length of the longest side is :

(a) 52 cm (b) 48 cm (c) 32 cm (d) 26 cm

The ratio of the number of boys and girls in a school is 3 : 2. If 20% of the boys and 25% of the girls are scholarship holders, what percentage of the students does not get the scholarship?

(a) 56 (b) 70 (c) 78 (d) 80

In a school, 10% of "the boys are same in number as th of the girls. What is the 4 ratio of boys to girls in that school?

(a) 3 : 2 (b) 5 : 2 (c) 2 : 1 (d) 4 : 3

Answer Key:

(1)-b; (2)-b; (3)-a; (4)-b; (5)-c; (6)-d; (7)-d; (8)-b; (9)-c; (10)-b