Question
A lorry and a Porsche were travelling from Town U to Town V which were 570 km apart. The Porsche set off 223 h later than the lorry but arrived 113 h earlier. If the average speed of the lorry was 57 km/h, find the average speed of the Porsche.
2 m

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A lorry and a Porsche were travelling from Town U to Town V which were 570 km apart. The Porsche set off 223 h later than the lorry but arrived 113 h earlier. If the average speed of the lorry was 57 km/h, find the average speed of the Porsche.