Question

2) determine a area total e o volume de um cilindro reto de altura 3mts e diametro da base 2mts.

Answer 1

At = ?   V = ?           H = 3 m       R = 1 m

At = 2 pi R ( R + H )

At = 2 . 3,14 . 1 ( 1 + 3 )

At = 6,28 . 4

At = 25,12 m²   ou At = 8 pi m²

V = pi R² H   

V = 3,14 . 1² . 3

V = 3,14 . 3

V = 9.42 m³  ou V = 3 pi m³