Question

Determine a área total e o volume do semicone com altura= 7 e raio= 2

Answer 1

$A_{lateral}=\pi r h \\ A= 3,14 \times 2 \times 7\\ A=43,96 cm^2 \\ A_{base}=\pi r^2 \\ A=3,14\times2^2 \\ A= 12,56cm ^2 \\ A_{total}=43,96+12,56=56,52 cm^2$