\[\boxed{\ \mathbf{1149\ (1149)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1.\ 1)\ 62,5 \cdot 3,6 = 225\ (км) -\]
\[путь\ автомобиля.\]
\[Ответ:75\ \frac{км}{ч.}\]
\[2.\ \ 1)\ 4,2 \cdot 54 = 226,8\ (км) -\]
\[путь\ поезда.\]
\[2)\ 226,8\ :63 = 3,6\ (ч) - время.\]
\[Ответ:3,6\ часа.\]
\[\boxed{\mathbf{1149}\mathbf{.}\mathbf{\ }}\]
\[1)\ \left( 2\frac{13}{48} + 2\frac{5^{\backslash 4}}{12} \right)\ :3\frac{3}{4} - 9\frac{3}{4}\ :12 =\]
\[= 4\frac{13 + 20}{48}\ :\frac{15}{4} - \frac{39}{4} \cdot \frac{1}{12} =\]
\[= 4\frac{33}{48} \cdot \frac{4}{15} - \frac{39}{4 \cdot 12} =\]
\[= 4\frac{11}{16} \cdot \frac{4}{15} - \frac{13}{16} =\]
\[= \frac{5^{\backslash 4}}{4} - \frac{13}{16} = \frac{20 - 13}{16} = \frac{7}{16}\]
\[= \left( 8\ :\frac{48}{19} - \frac{28}{15} \cdot \frac{55}{49} \right)\ :\left( 3\frac{3}{36} - 1\frac{25}{36} \right) =\]
\[= \left( \frac{19^{\backslash 7}}{6} - \frac{44^{\backslash 2}}{21} \right)\ :\frac{25}{18} =\]
\[= \frac{133 - 88}{42} \cdot \frac{18}{25} =\]