The total revenue (in Rs.) received by selling ‘x’ units of a certain product is given by: \(R(x) = 4x^2 + 10x + 3\).
What is the marginal revenue on selling 20 such units?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Rs. 170
Marginal revenue is the rate of change of total revenue with respect to the number of units sold:
\( \displaystyle MR = \frac{dR}{dx} = 8x + 10 \)
At x = 20:
\(MR = 8 \times 20 + 10 = 170\)
So the marginal revenue is Rs. 170.