Question
Betty and Xavier have a bicycle race. Betty cycles at a speed of 20 km/h. Xavier cycles at a speed of 25 km/h. If Xavier lets Betty start 45 min before him, how long will Xavier take to catch up with Betty?
3 m

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Betty and Xavier have a bicycle race. Betty cycles at a speed of 20 km/h. Xavier cycles at a speed of 25 km/h. If Xavier lets Betty start 45 min before him, how long will Xavier take to catch up with Betty?