Question

A taxi hurries with a constant speed of 84km/h how far can it travel in 5 hours

Answer 1

$distance \: travelled \: by \: car \: in \: an \: hour \: = \: 84km \: per \: h \\ \\ distance \: travelled \: by \: car \: in \: 5h = 84 \times 5 \\ = 420km \: per \: h$

Answer 2

Speed - 84 km 1 hr
Speed in 5 hrs - 84*5-420