A tangocola company wants to produce a new cylindrical tin as healthy protein drink which contain 300 cubic cm of protein drink. The cost of material used to make the sides of the container is ₹5 per square cm. While the cost of material used to make top and bottom of container is ₹ 10 per sq. meter. He wants to minimise the cost of container.

Give the answers of question:
What is the cost function which is to be minimised ?

Options

A. `3000/r +20 pi r^2`
B. `300/(r^2) +20 pi r^2`
C. ` 3000/r -20 pi r^2`
D. ` 300/r -20 pi r^2`

Answer

A