Out of 30 students in a class, 6 like football, 12 like cricket and remaining like tennis. Find the ratio of
(a) number of students liking football to the number of students liking tennis.
(b) number of students liking cricket to total number of students.

In a year, Seema earns Rs. 150000 and saves Rs.50000. Find the ratio of
(a) money that Seema earns to the money she saves.
(b) money that she saves to the money she spends.

In a college, out of 4320 students, 2300 are girls. Find the ratio of
(a) number of girls to the total number of students.
(b) number of boys to the number of girls.
(c) number of boys to the total number of students.

An amount of Rs.720 is to be distributed among Mark, Zack and Zen in the ratio of 7 : 4 : 9. Determine the total amount received by Zack and Zen.

Cost of 5 kg of wheat is Rs.30.50.
(a)What will be the cost of 8 kg of wheat?
(b) What quantity of wheat can be purchased in Rs. 61?

A train covers a distance of 720 km in 15 h.How much  distance will it cover in 18 h, if it is running at a uniform  speed?

Ritu wants to divide Rs 300 between his two sons Amit and Nitin in the ratio of their ages. If the age of Amit is 12 yr and that of Nitin is 8 yr. Find the share of each.

A car can cover a distance of 594 km in 108 L of petrol. How much petrol will be required by the car to cover a distance of 1758 km?

In a book shelf, the number of books on Social Studies to the number of books on Economics is 7 : 11, whereas the number of books on Economics to the number of books on Mathematics is 22 : 19. What is ratio of the number of Social Studies books to the Mathematics books?

A police truck needs 12 L of diesel to cover a distance of 852 km.
(a) What distance will it cover for 18 L of diesel?
(b) How many litres of diesel is required to cover a distance of 1349 km?

A train takes 2 h to travel from Ajmer to Jaipur, which are 130 km apart. How much time will it take to travel from Delhi to Bhopal which are 780 km apart, if the train is travelling the uniform speed?

Prepare five similar problems and ask your friends to solve them.
Five similar problems are as follows:
1. Meenu purchased 2 handkerchiefs for Rs. 30. Find the cost of one handkerchief.
2. The cost of 3 kg rice is Rs. 600. Find the cost of 1kg rice.
3. The cost of 5 combs is Rs. 30. Find the cost of 1 comb.
4. The cost of 12 envelopes is Rs. 60. Find the cost of 1envelope.
5. The cost of 8postcards is Rs. 8. Find the cost of 1postcard.