(1) A cone has height of 8cm and circular radius 6cm calculate (a) It's Volume (b) It's Slant Height (c) The Curved Surface Area (d) The Total Surface Area

Answer 1

r=3
use pythagoras to work out slant height (s) if h=8, ==> √(3^2+8^2)=s

pretty much plug in these values into the formula for a,c,d. Curved surface area is pi*r*s, don't count the base.