Answer:
Area = 119.2415 cm^2
Step-by-step explanation:
This is a cone on its head.
The total surface area can be calculated using the formula for the area of a cone.
Mathematically,
The Area A = 2πr(r + l)
where r = radius of the circular base which is 1/2 * D.
D is the diameter given as 3.5
so r = 3.5/2 = 1.75 cm
l = slant height = 9.1 cm
and π = 3.14
Plugging these values into the equation of A, we have;
A = (2 * 3.14 * 1.75)(1.75 + 9.1)
A = 10.99(10.85)
A = 119.2415 cm^2
