Joe Spout left a campsite on a trip down the river in a canoes, traveling at 6km/h. Four hours later, Joe's father set out after him in a motorboat. The motorboat traveled at 30km/h. How far had Joe traveled down the river when his father overtook him?

Question

How do I write this as an equation?

Answer 1

they to the same distance, with four hours time difference.
distanceJoe=6*t
distancdDad=30(t-4)

set the distances equal, solve for time t.
then solve for distance.

Answer 2

So how do I write it as one single equation?

Answer 3

I know the time is one hour.