What is the speed of a train that covers a distance of 300 km in 2.5 hours?
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What is the resultant vector when a displacement vector of magnitude 25 in the east direction is added to a displacement vector of magnitude 18 in the north-west direction?
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What is the maximum value of the function f(x) = x^3 - 2x^2 + 4x - 9 on the interval [0, 5]?