Question
A lorry and a Porsche were travelling from Town D to Town E which were 495 km apart. The Porsche set off 256 h later than the lorry but arrived 116 h earlier. If the average speed of the lorry was 55 km/h, find the average speed of the Porsche.
2 m

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A lorry and a Porsche were travelling from Town D to Town E which were 495 km apart. The Porsche set off 256 h later than the lorry but arrived 116 h earlier. If the average speed of the lorry was 55 km/h, find the average speed of the Porsche.