@OP
An island is located 3 kilometers out to sea directly across from some point along a straight shoreline. A house sits 4 kilometers down the beach from the point directly across from the island. If a person on the island can row at a rate of 2 km/h and walk at a rate of 5 km/h, where should the person come ashore in order to get home in the shortest possible time?
You're not very good at this.