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Rate of Change, Marginal Cost & Revenue · Question 64 of 79

What profit does the bakery make on a day it makes and sells 30 cakes?

Question 64

EasyOriginal question

A home bakery's cost of making xx cakes a day is C(x)=200+10x+0.5x2C(x) = 200 + 10x + 0.5x^{2} rupees. Every cake sells for ₹50, however many she makes.

What profit does the bakery make on a day it makes and sells 30 cakes?

Options for question 64

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. Revenue =50×30=1,500= 50 \times 30 = 1{,}500; cost =200+300+450=950= 200 + 300 + 450 = 950.

  2. Profit =1,500−950=550= 1{,}500 - 950 = 550 rupees.

Worth noting

₹750 leaves out the fixed ₹200 a day.

Concept
Profit is revenue minus cost
Typical time
90 s
Your time
—
The rule this testsMaximising profit and revenue
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