Mathematics · Speed, Time and Distance

A motorcar can finish a certain journey in 9 hours at a speed of 20 m/s. In order to cover the same distance in 8 hours, the speed of the motorcar (in km/h) must be increased by:

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A motorcar can finish a certain journey in 9 hours at a speed of 20 m/s. In order to cover the same distance in 8 hours, the speed of the motorcar (in km/h) must be increased by:

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A motorcar can finish a certain journey in 9 hours at a speed of 20 m/s. In order to cover the same distance in 8 hours, the speed of the motorcar (in km/h) must be increased by:

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