Question

Find the total surface area of the solid shown, correct to the nearest cm2

Answer 1

Answer:

$550.44m^2$

Step-by-step explanation:

You need both formulas to solve for area on a cone

$A=\pi rl+\pi r^2\\l=\sqrt{r^2+h^2}$

$A=\pi r(r+\sqrt{h^2+r^2})\\ =\pi *6.4*(6.4+\sqrt{17^2+6.4^2})\\ 493.90cm^2$(cone)

$A=2\pi r^2\\=2\pi 3^2\\=56.54m^2$(hemisphre)

$493.90+56.54=550.44m^2$