Ratio & Proport...

The students in three classes are in the ratio 2:3:5. If 20 students are increased in each class, the ratio changes to 4: 5: 7. What is the total number in the three classes before the increase?

The ratio between two numbers is 3:4. If each number be increased by 2, the ratio becomes 7:9. Find the numbers.

Divide ₹1540 among A,B,C so that A shall receive 2/9 as much as B and C together, and B 3/11 of what A and C together do. Find the share of A, B and C.

In a fort there is provision for 40 days for 275 persons. If after 16 days, 125 persons leave the fort, for how many more days the provision will now last?

A fort has provision for 35 days. If after 5 days 225 more persons joined and the food lasts25 days, how many men are there in the fort?

The ratio between the ages of Rahim and Karim is 3:5 and the sum of their ages is 56 years. What was the ratio of their ages 7 years ago?

The prices of a scooter and television set are in the ratio 3:2. If a scooter costs ₹6,000 more than the television set, what is the price of the television set?

The prices of scooter and a moped are in the ratio of 9 : 5. If a scooter costs ₹4200 more than a moped, find the price of the moped.

A sum of money is divided between two persons in the ratio of 3:5. If the share of one person is ₹ 20 less than that of the other, find the sum.