Raymond B. answered • 04/21/23
Tutor
5
(2)
Math, microeconomics or criminal justice
bottom plus side area
3=diameter = 2r
r=3/2 in.
4 in. = slant height=s
cone's vertical height = h
h^2=s^2-r^2
= pi(3/2^2) + side of a cone
=9pi/4 +pirsqr(h^2+r^2)
= 9pi/4+pirsqr(s^2)
=9pi/4 +pirs
= 9pi/4 +3pi/2(4)
= 9pi/4 +6pi
= 33pi/4 in^2
=about 33(3.141593)/4
= about 25.918 square inches
or just use an online "cone surface area calculator"
google that and several online calculators show up
