Your list · 0 हिं

Rate of Change, Marginal Cost & Revenue · Question 37 of 79

What is the factory's average cost of a radio at 10 radios a day?

Question 37

EasyOriginal question

A factory's cost of making $x$ radios a day is $C(x) = 500 + 40x - 0.6x^{2} + 0.01x^{3}$ rupees.

What is the factory's average cost of a radio at 10 radios a day?

₹31Correct answerYour answer₹35Correct answerYour answer₹84Correct answerYour answer₹85Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

$C(10) = 500 + 400 - 60 + 10 = 850$ .
Average cost $= \frac{850}{10} = 85$ rupees.

Worth noting

₹35 leaves out the fixed ₹500, which each radio still has to share.

Concept: Average cost and marginal cost differ
Typical timeTypical: 90 s
Your timeYours: —

The rule this testsMarginal cost

Practise this chapter →

Ten questions from Rate of Change, Marginal Cost & Revenue, at your own pace.

Practise this chapter →

Ten questions from Rate of Change, Marginal Cost & Revenue, at your own pace.

Practise this chapter All 79 questions in Rate of Change, Marginal Cost & Revenue Revise the notes for Rate of Change, Marginal Cost & Revenue