13. Exercise problems IX

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.

 

Number of toys \(=\)  or

 

[Note: Enter the answer in ascending order]