Posted by Anonymous on .
Find the slant height of a cone with surface area of 178.6 in2 and a radius of the base of 4.9 in

geometry 
Steve,
a = pi r s
178.6 = 3.14 * 4.9 * s
s = 11.6
or, if you are including the base of the cone,
a = pi*r(r+s)
178.6 = 3.14 * 4.9 (4.9+s)
s = 6.71