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Two parallel rail tracks run north-south...

Two parallel rail tracks run north-south Train `A` moves north with a speed of `54 km h^(-1)` and train `B` moves south with a speed of `90 km h^(-1)`. What is the
a. relative velocity of `B` with respect to `A`?
b. relative of a monkey running on the roof of the train `A` against its motion (with its velocity of `18 km h^(1)` with respect to the train `A` ) as observed by a man standing on the ground?

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Two paarallel rail tracks run north-south Train A moves north with a speed of 54 km h^(-1) and train B moves south with a speed of 90 km h^(-1) . What is the a. relative velocity of B with respect to A ? b. relaity of a monkey running on the roof of the train A against its motion (with its velocity of 18 km h^(1) with respect ot the train A ) as observed by a man standing on the fround?

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