The total cost (in rupees) of producing units of an item is

MATHEMATICS · Single correct · CBSE · Mathematics · Applications of Derivatives · Applications of Derivatives

Problem

The total cost (in rupees) of producing

x

units of an item is

C(x)=x^{2}+20x+36

. For what value of

x

is the average cost

\dfrac{C(x)}{x}

minimised? (a)

8

(b)

6

(c)

10

(d)

4