A sum of ₹2,500 becomes ₹2,975 in 3 years at simple interest. What is the rate of interest?

The ratio of copper and zinc in a brass alloy is 13 : 7. How much zinc will be there in 100 kg of the alloy?

The prices of two cycles are in the ratio 16 : 23. If the price of the first cycle is increased by 10% and that of the second by ₹477, the ratio becomes 11 : 20. Find the original price of the second cycle.

The ratio of copper and zinc in an alloy is 5 : 4. If 1.25 kg of zinc is added to 11.25 kg of this alloy, find the new ratio of copper to zinc.

The ratio of the ages of X and Y is 3 : 1. After 15 years, the ratio will be 2 : 1. Find the present age of X.

In a partnership, A and B start a business by investing ₹20,000 and ₹25,000 respectively. After 4 months, C joins them with ₹15,000. Find the ratio of their profits at the end of the year.

If the ratio of the areas of two circles is 4 : 9, then the ratio of their circumferences is:

The ratio of the ages of A and B is 4 : 5. If the sum of their ages is 81 years, find the age of B after 5 years.

A bag contains ₹1, 50p, and 25p coins in the ratio 5 : 6 : 8. If the total value is ₹420, find the number of 50p coins.

The ratio of the speeds of two cars is 3 : 4. If the first car covers a distance of 150 km in 5 hours, find the speed of the second car.

The ratio of the cost price and selling price of an article is 8 : 9. What is the profit percentage?

A mixture of 40 litres of milk and water contains milk and water in the ratio 3 : 1. How much water must be added to this mixture so that the ratio of milk and water becomes 2 : 1?

In a partnership, A, B, and C invest ₹20,000, ₹25,000, and ₹30,000 respectively. If the total profit at the end of the year is ₹15,000, find B's share of the profit.

If 10 men can complete a work in 12 days, how many men are required to complete the same work in 8 days?

The ratio of the ages of X and Y is 7 : 3. After 4 years, the ratio becomes 2 : 1. What is the present age of X?

Seats for Mathematics, Physics and Biology in a school are in the ratio 5:7:8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats?

A sum of ₹5000 amounts to ₹5600 in 2 years at simple interest. What is the rate of interest per annum?

If 10 men can complete a piece of work in 12 days, how many days will 15 men take to complete the same work?

The sum of the ages of a father and his son is 45 years. Five years ago, the product of their ages was 34. What is the father's current age?

A father is 30 years older than his son. In 5 years, the father's age will be three times the age of his son. What is the father's current age?