Peter leaves Riverdale at 10:00 a.m. and starts pedaling his bicycle at 10 mph. If John starts on the same path at 2:00 p.m., when will he catch Peter if he pedals at 15 mph?
10t = 15(t â€“ 4)
t=12 hours --> which is the correct answer
But why is that when i use the alternative scenario where
Peter = t+4 (instead of t)
John = t (instead of t-4)
we have the equation 10(t+4) = 15t
t = 8 hours --> which is wrong
shouldn't the two methods yield the same answer?
Impossible is nothing