Question

If the production cost of 3 units of a commodity is Rs. 45 and the production cost of 4 units is Rs. 80, then the marginal cost will be: (a) 20 (b) 15 (a) 35 (c) 2​

Answer 1

Answer:

let y be the production cost and X be the units

then ((y-45)/(80-45))=((x-3)/(4-3))

((y-45)/35)=x-3

y-45=35x-105

y=35x-105+45

dy/dx=35

so marginal cost is 35.