Consider a swimmer who wants to swim directly across a river as in Example 4.7. If the s...

Consider a swimmer who wants to swim directly across a river as in Example 4.7. If the speed of the current is 0.30 m/s and the swimmer’s speed relative to the water is 0.60 m/s, how long will it take her to cross a river that is 15 m wide?

(reference example 4.7)