515
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The answer is (210 + 820)/2 = 515 I did not use a thousand chart - I don't even know what that is!
210 * 4 = 840 miles ■
Multiplying speed by time gives 820 x 3 = 2460 kilometres.
Every hour the car would cover 60 kilometres.Therefore, 60 x 3 = 180 + 30 = 210 kilometres in total.
If it travels 210 miles in 5 days it travels 210 divided by 5 miles in one day. 210 / 5 = 42 miles per day So in 8 days it goes 42 miles times 8 42 * 8 = 336 miles