Question

steel is $50 per cubic foot. What is cost of cone with radius 7.5 inches and 25 inches height?

Answer 1

Work out all dimensions in feet.

r=7.5 inches = 7.5/12=0.625'
h=25 inches = (25/12)'

Volume = (1/3) π r² h
and
from the price of $50/ft², we get

Cost=volume*price
=(1/3) π r² h * 50

Round the answer to two decimal places (to the cent).

I'll leave it to you to work with the buttons of your calculator.

Answer 2

Thank you, it works.

Answer 3

You're welcome!