Mathematics

Mathematics

Problem

A train travels 360 km at its usual speed. Had the speed been 5 km/h less, the journey would have taken 1 hour longer. What is the usual speed of the train? a) 48 km/h48\ \text{km/h} b) 45 km/h45\ \text{km/h} c) 40 km/h40\ \text{km/h} d) 44 km/h44\ \text{km/h}

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