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 on selling 20 such units ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Rs. 170
Marginal Revenue (MR) is,
$MR=\frac{dR}{dx}=\frac{d(4x^2+10x+3)}{dx}$
$=8x+10$
$MR(20)=8×20+10$
$=170$