Question

Correct

It took Ramon 10 hours to drive to a family reunion. On the way home, he was able to increase his average speed by 11 mph and make the return drive in only 8
hours. Find his average speed on the return drive.

Answer 1

• Answer:

v₂ = 55mph

• Explanation:

Hi there !

Velocity formula

v = distance/time = d/t => d = vₓt

v₁ = v₂ - 11

t₁ = 10h

t₂ = 8h

d = v₁ₓt₁ = (v₂ - 11)t₁

d = v₂t₂

(v₂ - 11)t₁ = v₂t₂

replace t₁ ; t₂

(v₂ - 11)10 = v₂8

10v₂ - 11ₓ10 = 8v₂

10v₂ - 8v₂ = 110

2v₂ = 110

v₂ = 55 mph

Good luck !