A student uses a stopwatch to time a runner running around a circular track. The runner runs two laps (twice around the track). The diagrams show the reading on the stopwatch when the runner starts running, at the end of the first lap, and at the end of the second lap.
What is the time taken for the runner to run the second lap?
0min 50s
2 )
1min 10s
3 )
1 min 13 sec
4 )
2min 03s
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