Question
PSLE
Betty and Billy ran in a race. When Billy had completed the race, Betty had only run 59 of the distance. Betty's speed was 80 m/min slower than Billy's speed. Both of them did not change their speeds throughout the race. What was Billy's speed in m/min?
3 m

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PSLE
Betty and Billy ran in a race. When Billy had completed the race, Betty had only run 59 of the distance. Betty's speed was 80 m/min slower than Billy's speed. Both of them did not change their speeds throughout the race. What was Billy's speed in m/min?