Question

The cost of production of each toy (in rupees) was found to be 55 minus the number of toys produced in a day. Let’s say $x$ toys were produced on a day, what is the total cost of production in terms of $x$?

• A. x² - 55x
• B. (x-55)(x+55)
• C. x² + 55x
• D. 55x – x²

Answer 1

The correct option is D

55x – x²

The number of toys produced on that day be $x$.

Therefore, the cost of production (in rupees) of each toy that day = $55–x$

So, the total cost of production (in rupees) that day =$x\times (55-x)$ = $55x$– $x^2$