Question
A van and a Porsche were travelling from Town C to Town D which were 495 km apart. The Porsche set off 235 h later than the van but arrived 125 h earlier. If the average speed of the van was 55 km/h, find the average speed of the Porsche.
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A van and a Porsche were travelling from Town C to Town D which were 495 km apart. The Porsche set off 235 h later than the van but arrived 125 h earlier. If the average speed of the van was 55 km/h, find the average speed of the Porsche.