Question 840088
Jimmy can ride 7 km on his bicycle going to school at the same time it takes him to walk 3 km.
 If his riding rate is 2 kph faster than his walking rate, how fast does he walk?
:
Let s = his walking speed
then
(s+2) = his riding speed
:
Write a time equation time = dist/speed
:
{{{7/((s+2))}}} = {{{3/s}}}
cross multiply and find s