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Mathematics, 30.08.2021 17:50 madmar

A man cycles 20 km from A to B. If he increases his speed by 3 km/h, he saves 90 minutes on the journey. Find his original speed in km/h.​

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A man cycles 20 km from A to B. If he increases his speed by 3 km/h, he saves 90 minutes on the jour...
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