Question
A lorry and a Porsche were travelling from Town Y to Town Z which were 1020 km apart. The Porsche set off 215 h later than the lorry but arrived 245 h earlier. If the average speed of the lorry was 68 km/h, find the average speed of the Porsche.
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A lorry and a Porsche were travelling from Town Y to Town Z which were 1020 km apart. The Porsche set off 215 h later than the lorry but arrived 245 h earlier. If the average speed of the lorry was 68 km/h, find the average speed of the Porsche.