[tex]1 \ h = 60 \ min\\s = v\cdot t \ \ \rightarrow \ \ t = \frac{s}{v}[/tex]
6.
[tex]1) \ t = \frac{126 \ km}{60\frac{km}{h}} = \underline{2,1 \ h} = 2,1\cdot60 \ min = \underline{126 \ min}\\\\2) \ t = \frac{225 \ km}{100\frac{km}{h}} = \underline{2,25 \ h} = 2,25\cdot60 \ min = \underline{135 \ min}[/tex]
[tex]3) \ t = \frac{240 \ km}{80\frac{km}{h}} = \underline{3 \ h} = 3\cdot60 \ min = \underline{180 \ min}[/tex]
[tex]4) \ \frac{170 \ km}{70\frac{km}{h}}=\underline{2\frac{3}{7} \ h} = \frac{17}{7}\cdot60 \ min = \underline{145\frac{5}{7} \ min}[/tex]
[tex]5) \ t = \frac{125 \ km}{95\frac{km}{h}} = \frac{25}{19} \ h =\underline{ 1\frac{6}{19} \ h} = \frac{25}{19}\cdot60 \ min = \underline{78\frac{18}{19} \ min}[/tex]
