Speed, Distance & Time: Hard Test 8

15 questions · 15 minutes

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The graph shows a journey to a friend's house and back. How long did the visit last?
A train 200 m long travels at 25 m/s. It takes 40 seconds from the front entering a tunnel to the back leaving it. How long is the tunnel?
A driver covers 30 km at 30 km/h, then 60 km at 60 km/h, then 90 km at 45 km/h. What is the average speed for the whole journey?
The table shows four cyclists. Which one was the slowest?
A runner sets off at 6 km/h. Twenty minutes later a cyclist follows along the same road at 18 km/h. How far from the start does the cyclist catch up?

Check the units first. A time of 30 minutes must become 0.5 hours before it is used with a speed in kilometres per hour.
Average speed is total distance divided by total time - not the average of the individual speeds, which is a favourite trap.