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Project 1: Part A: Zevo toy boats
You are a group of scientists working for Zevo™ Toy Company a subsidiary of the Carver Media Group. A mysteriously large shipment of discontinued toy boats (which can neither turn nor change speed) has been delivered to Zevo for a classified project. The manuals for the boats have been long lost which is problematic as you have been tasked with determining the speed of these boats as they are going to be shipped out soon as part of the project EverReady. At your disposal, you have a handful of toy boats, a uniformly flowing river of width $W=20\,{\rm m}$ with unknown speed, and your trusty stopwatch.
While you are at the river, you are approached by an anonymous environmentalist group who have asked you if you can figure out the speed of the river for them. You are environmentally conscious and decide to help the group out.