Chapter 4

Quadratic Equations

1. Student of a class are made to stand in rows. If 4 students are extra in a row, there would be 2 rows less. If 4 students are less in a row, there would be 4 more rows. There would be 4 more rows. Find the number of students in the class.

2. Two pipes running together can fill a cistern in 6 minutes. If one pipe takes 5 minutes more than the other to fill the cistern, find the time in which each pipe would fill the cistern.

3. Rs. 9,000 were divided equally among a certain number of persons. Had there been 20 more persons, each would have got Rs. 160 less. Find the original number of persons.

4. Some student planned a picnic. The budget for food was Rs. 500. But 5 of these failed to go and thus the cost of food for each member increased by Rs 5. How many students attended the picnic?

5. The sum of two number is 15 and sum of there reciprocals is 3/10. Find the numbers.