Answer:
30 minutes
Explanation:
To do this problem, we need to locate where the blue line (tom) and red line (Andy) reaches the 10 km mark on the graph.
Go to up 10km on the y-axis and then see where the red line is. The time at this point is 12:40
Do the same for the blue line. The time at this point is 13:10
If you calculate the difference in time between 12:40 and 13:10, you get 30 minutes.
This means, it took Tom 30 minutes longer than Andy to canoe 10km.