Question

Kim rides a total of $120 km in the bicycle portion of a triathlon. the course is an out and back route. it takes her 6 hours on the way out against the wind. the right back takes her 5 hours with the wind. find the speed of the wind and Kim speed riding her bike in still air

Answer 1

Speed of the wind = 20km/hr

Speed of Kim = 24km/hr​

Step-by-step explanation:

Speed is calculated using the formula below;

Speed = Distance/Time

The distance to and fro are the same and equal to 120km

If it takes her 6 hours on the way out against the wind, the speed of the wind is expressed as;

Speed = 120/6

Speed of the wind = 20km/hr

Similarly, if it takes her 5 hours with the wind, Kim speed when riding her bike in air is expressed as;

Speed of Kim = 120/5

Speed of Kim = 24km/hr​