Question

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?

Answer 1

• Answer:

24 mph

• Step-by-step explanation:

Hi there !

Vm = 21mph

V1 = 18mph

V2 = ?

Vm = (V₁ + V₂)/2

2Vm = V₁ + V₂

V₂ = 2Vm - V₁

replace Vm ; V₁

V₂ = 2×21mph - 18mph

= 42mph - 18mph

= 24 mph

Good luck !