SOLUTION: a toy car travels from A to B at a constant speed of 20km/h and immediately returns to A at a constant speed v. if average speed of the car is 24km/h the find v?

Question 1063036: a toy car travels from A to B at a constant speed of 20km/h and immediately returns to A at a constant speed v. if average speed of the car is 24km/h the find v?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Constant Travel Rates Rule, RT=D to relate rate, time, distance.

               SPEED      TIME         DISTANCE
A to B          20        d/20          d
B to A           v        d/v           d
Totals                    d/20+d/v     2d

Average         24

Average rate expression is and the value is given.

Simplify this and solve for v.

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