Question
PSLE
Sarah and Lee ran in a race. When Lee had completed the race, Sarah had only run 57 of the distance. Lee's speed was 70 m/min faster than Sarah's speed. Both of them did not change their speeds throughout the race. What was Sarah's speed in m/min?
3 m

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PSLE
Sarah and Lee ran in a race. When Lee had completed the race, Sarah had only run 57 of the distance. Lee's speed was 70 m/min faster than Sarah's speed. Both of them did not change their speeds throughout the race. What was Sarah's speed in m/min?