SOLUTION: A lampshade is in form of a frustum of a cone. The top and bottom diameters are 10cm and12cm respectively and the height is12cm. Calculate a) the curved surface area of the frust

Algebra ->  Surface-area -> SOLUTION: A lampshade is in form of a frustum of a cone. The top and bottom diameters are 10cm and12cm respectively and the height is12cm. Calculate a) the curved surface area of the frust      Log On


   

Question 934754: A lampshade is in form of a frustum of a cone. The top and bottom diameters are 10cm and12cm respectively and the height is12cm. Calculate
a) the curved surface area of the frustum
b) the volume of the frustum
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint:

The frustum is the base of the cone when you chop off the top piece (see pic below)



So the idea is to find the lateral surface area of the larger cone, then subtract off the lateral surface area of the smaller top cone. The same applies for the volumes as well.