Question

15° 45' multiplicado por 3 qual é ​

Answer 1

Lembrando que:

$\left\{\begin{matrix}1^\circ&=&60'\\ 1'&=&60''\end{matrix}\right.$

Temos:

$(15^\circ\,45')~\times~3~=\\\\\\=~(15^\circ+45')~\times~3\\\\\\=~3\times15^\circ~+~3\times45'\\\\\\=~45^\circ~+~135'\\\\\\=~45^\circ~+~60'+60'+15'\\\\\\=~45^\circ+1^\circ+1^\circ+15'\\\\\\=~47^\circ+15'\\\\\\=~\boxed{47^\circ15'}$