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NCERT Class 10 Maths Solutions Chapter - 4 Quadratic Equations, Ex - 4.2

Ex - 4.2

Question 1.
                   

Solution



Question 2.  (i) John and Jayanti together have 45 marbles. Both of them lost 5 marbles each, and the product of the number of marbles they now have is 124. Find out how many marbles they had.
 (ii) A cottage industry produces a certain number of toys in a day. The cost of production of each toy (in rupees) was found to be 55 minus the number of toys produced in a day. On a particular day, the total cost of production was Rs 750. Find out the number of toys produced on that day.

Solution



Question 3.  Find two numbers whose sum is 27 and product is 182.

Solution



Question 4.
                 

Solution



Question 5.
                

Solution



Question 6.  A cottage industry produces a certain number of pottery articles in a day. It was observed on a particular day that the cost of production of each article (in rupees) was 3 more than twice the number of articles produced on that day. If the total cost of production on that day was Rs 90, find the number of articles produced and the cost of each article.

Solution



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Ex - 4.2

Question 1.
                   

Solution



Question 2.  (i) John and Jayanti together have 45 marbles. Both of them lost 5 marbles each, and the product of the number of marbles they now have is 124. Find out how many marbles they had.
 (ii) A cottage industry produces a certain number of toys in a day. The cost of production of each toy (in rupees) was found to be 55 minus the number of toys produced in a day. On a particular day, the total cost of production was Rs 750. Find out the number of toys produced on that day.

Solution



Question 3.  Find two numbers whose sum is 27 and product is 182.

Solution



Question 4.
                 

Solution



Question 5.
                

Solution



Question 6.  A cottage industry produces a certain number of pottery articles in a day. It was observed on a particular day that the cost of production of each article (in rupees) was 3 more than twice the number of articles produced on that day. If the total cost of production on that day was Rs 90, find the number of articles produced and the cost of each article.

Solution



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