Question
A lorry and a Porsche started travelling from Town T to Town U at the same time. After 5 hours, the Porsche reached Town U while the lorry covered only 57 of the journey. The speed of the lorry was 30 km/h less than the speed of the Porsche. Find the speed of the Porsche.
3 m

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A lorry and a Porsche started travelling from Town T to Town U at the same time. After 5 hours, the Porsche reached Town U while the lorry covered only 57 of the journey. The speed of the lorry was 30 km/h less than the speed of the Porsche. Find the speed of the Porsche.