- #1
Amith2006
- 427
- 2
Homework Statement
The inner and outer radii of a hollow steel hemispherical vessel are 2 cm and 3 cm respectively.what is the total cost of painting the vessel all over at the rate of 70 cents per cm² ?
[ b]2. Homework Equations [/b]
Curved surface area of hemisphere=2[pi]*[radius]²
The Attempt at a Solution
total Surface area= 2[pi]*{[inner radius]² + [outer radius]²}
TOTAL cost = 0.7*total Surface area
is it right?