Question

Can anyone help me with this?

Answer 1

`the \: surface \: area \: of \: both \: cone = 2(\pi{rl} + \pi{ {r}^(2) } ) \\ total \: surface \: area \: of \: both \: cone = 2(\pi{( (1.4)/(2) )(2.7)} + \pi{ {( (1.4)/(2) )}^(2) } ) \\ total \: surface \: area \: of \: both \: cone = \boxed{4.76\pi} \\ \\ the \: surface \: area \: of \: the \: cylinder = 2\pi{rl} +2 \pi{ {r}^(2) } \\ the \: surface \: area \: of \: the \: cylinder = 2\pi{( (1.4)/(2) )(7.5)} +2 \pi{ {( (1.4)/(2) )}^(2) } \\ the \: surface \: area \: of \: the \: cylinder = \boxed{11.48\pi} \\ \\ therefore \: the \: surface \: area \: of \: the \: composite \: object \: = \boxed{4.76\pi + 11.48\pi} \\ the \: surface \: area \: of \: the \: composite \: object \: = \boxed{16.24\pi}`