Question
PSLE
Harry and Seth ran in a race around a 400 m track. Harry ran at a speed of 220 m/min and Seth at a speed that was 18 m/min slower than Harry throughout the race. How many complete rounds would Harry have finished when he ran a distance of 900 m more than Seth?
3 m

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PSLE
Harry and Seth ran in a race around a 400 m track. Harry ran at a speed of 220 m/min and Seth at a speed that was 18 m/min slower than Harry throughout the race. How many complete rounds would Harry have finished when he ran a distance of 900 m more than Seth?