Asked by kelvin

The distance between two towns P and Q is 390 km. John left town P at 7:30 am and travelled towards town Q at an average speed of 60 km/hr. Half an hour later Patrick left town Q and travelled towards town P at the same speed. At what time did they meet?

* please guys assist me this question**
Answered by sara
velocity=distance/time
to find the time patrick reached
Answered by sara
sorry john
Answered by sara
its more physics than math, anyways, i guess but im not sure
since patrick left after 30 min,
u need to add 30 min on johns arrival time.
Answered by Scott
when Patrick left (at 8:00 am), John had traveled 30 km
... so the distance between them was 360 km

they are closing the distance at 120 kph

how long 'til they meet?

what time is it?
Answered by sara
i used to take that material last year ,now i forgot it, sorry
Answered by Reiny
time taken by John --- t hours
time taken by Pt = t - 1/2

distance covered by John = 60t km
distance covered by Pat = 60(t-1/2) = 60t - 30

60t + 60t - 30 = 390
120t =420
t = 3.5 hrs

finish it up
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