Answer:
Step-by-step explanation:
Refer to attached table for inputs
Below equation is for total time traveled (middle column of table). Solving for x:
- 20/(14 + x) + 20/(14 - x) = 3.5
- 20(14 - x) + 20(14 + x) = 3.5(14 + x)(14 - x)
- 20*2*14 = 3.5(14² - x²)
- 160 = 196 - x²
- x² = 36
- x = √36
- x = 6
Speed of wind is 6 miles per hour
