Question 239947
you've got the times and speeds reversed


they overtake when they have travelled the same DISTANCE (rate x time)


the shorter time goes with the faster speed


60 t = 48 (t + 1/3) ___ the Smiths had a 20 min head start


12 t = 16 ___ t = 4/3 or 1:20


8:20 + 1:20 = 9:40