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vladimir2022 [97]

3 years ago

13

Franklin rides his bike to the beach averaging 18mph. He rides home along the same route. What speed must he average on the way

home if he wants to average 21 miles per hour for the round trip?

1 answer:

Sedaia [141]3 years ago

8 0

<em>Answer:</em>

<em> 24 mph</em>

<em>Step-by-step explanation:</em>

<em>Hi there ! </em>

<em>Vm = 21mph</em>

<em>V1 = 18mph</em>

<em>V2 = ?</em>

<em>Vm = (V₁ + V₂)/2</em>

<em>2Vm = V₁ + V₂</em>

<em>V₂ = 2Vm - V₁</em>

<em>replace Vm ; V₁</em>

<em>V₂ = 2×21mph - 18mph</em>

<em>= 42mph - 18mph</em>

<em>= 24 mph</em>

<em>Good luck !</em>

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