Mathematics, 04.09.2020 23:01 lifewseth

a boy runs at an average 5 km/h in a cross country race. the circuit is 6 km long. At the halfway point, the boy increases his average speed to 6km/h. How long does it take the boy to complete the race?

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a boy runs at an average 5 km/h in a cross country race. the circuit is 6 km long. At the halfway po...