(In reply to re: solution
by Steven Lord)
I agree. Unless I have misunderstood his solution, Charlie has assumed a cone radius of 10, rather than a cone diameter of 10 (with a radius of 5). Using Charlie's method, but the correct radius, his answer agrees with yours.
Edited on September 7, 2018, 11:26 pm
Posted by broll
on 2018-09-07 23:22:53