I need help please thanks ....

Mathematics

1 answer:

solniwko [45]3 years ago

3 0

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

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