A runner runs around a circular track four times.
Their coach uses a stopwatch to record the times at the start of the run, after two laps, and at the end of the four laps. The readings from the stopwatch are:
What is the average time for one lap of the track?
80.0 s80.0\text{ s}80.0 s
81.4 s81.4\text{ s}81.4 s
82.5 s82.5\text{ s}82.5 s
85.0 s85.0\text{ s}85.0 s
164 exam-style questions on CIE IGCSE Physics Physical quantities and measurement techniques, covering Physical quantities and measurement techniques. Each one has a worked solution and a mark scheme showing where the marks go.