Question
The distance between City Z and City A was 660 km apart. A convertible travelled at an average speed of 84 km/h from City Z to City A. At the same time, a lorry travelled at an average speed of 81 km/h from City A to City Z. How much further did the convertible travel than the lorry when the convertible met the lorry on the way?
3 m

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The distance between City Z and City A was 660 km apart. A convertible travelled at an average speed of 84 km/h from City Z to City A. At the same time, a lorry travelled at an average speed of 81 km/h from City A to City Z. How much further did the convertible travel than the lorry when the convertible met the lorry on the way?