Answer:
Note that surface is a triangle of base 3.14 * 14.8 = 46.6 cm
B / 2 = 23.2 cm 1/2 base
the height of triangle = 10 cm
A = 23.2 * 10 = 232 cm the area of the surface
Area formulas provides
A = Π r (r^2 + h^2)^1/2 which is the same as above
The quantity in brackets is just the slant height of 10 cm
