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Two boats start together and race across a 78-km-wide lake and back. Boat A goes across...

Two boats start together and race across a 78-km-wide lake and back. Boat A goes across at 78 km/h and returns at 78 km/h. Boat B goes across at 39 km/h, and its crew, realizing how far behind it is getting, returns at 117 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?)


By how much?
km

(b) What is the average velocity of the winning boat?
km/h

science   physics   
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Answer #1

tenme Time taken by Boat B- shr +& 1구 2hr 40 min Velocity 38

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