Two boats start together and race across a 48-km-wide lake and back. boat a goes across at 48 km/h and returns at 48 km/h. boat b goes across at 24 km/h, and its crew, realizing how far behind it is getting, returns at 72 km/h. turnaround times are negligible, and the boat that completes the round trip first wins.
(1) which boat wins? (or is it a tie? )
(a) boat a
(b) boat b
(c) it's a tie
.
(2) by how much? answer in km
(3) what is the average velocity of the winning boat? answer needs to be km/h

Part 1)

Boat A will win the race

Part 2)

Boat A will win the race by 48 km as the 2nd boat will reach the other end while boat A will just touches the finish line

Part 3)

average velocity must be zero

Explanation:

As we know that the distance moved by the boat is given as

now the time taken by the boat to move to and fro is given as

Time taken by Boat B to cover the distance

Part 1)

Boat A will win the race

Part 2)

Boat A will win the race by 48 km as the 2nd boat will reach the other end while boat A will just touches the finish line

Part 3)

Since the displacement of Boat A is zero

so average velocity must be zero

magnityde and direction

answer: what are you talking about?

explanation: