Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are negligible, and the boat that completes the round-trip first wins. (a) Which boat wins? (Or is it a tie?) boat A boat B it's a tie By how much? km (b) What is the average velocity of the winning boat? km/h I have no idea how to do this please help!


Answered by Angela Vargas

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