A person in a factory has to lift a box on to a shelf. high shelf
box
low shelf
Which action involves the person doing the least amount of work?
A lifting the box quickly to the high shelf
B lifting the box slowly to the high shelf
Clifting the box to the low shelf first then lifting it to the high shelf
D lifting the box to the low shelf instead of to the high shelf

Ibelieve the answer is b. dugout

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

Igot 56.55 as the anwer