Question
PSLE
Risa and Jack ran in a race. When Jack had completed the race, Risa had only run 35 of the distance. Risa's speed was 60 m/min slower than Jack's speed. Both of them did not change their speeds throughout the race. What was Jack's speed in m/min?
3 m

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PSLE
Risa and Jack ran in a race. When Jack had completed the race, Risa had only run 35 of the distance. Risa's speed was 60 m/min slower than Jack's speed. Both of them did not change their speeds throughout the race. What was Jack's speed in m/min?