Chemistry, 02.10.2021 02:20 cxttiemsp021

Mr. David drove from his home to his work place. For the first 1.2 hours, he travelled at a constant speed of 65 km/h. For the next 2.3 hours, he travelled at a constant speed of 70 km/h. What was the average speed for the whole journey? km/h

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Mr. David drove from his home to his work place. For the first 1.2 hours, he travelled at a constant...

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