A and B together can do a piece of work in 6 days and B alone can do the same work in 9 days in how many days can a alone complete the work
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velocity
/vɪˈlɒsɪti/
noun
the speed of something in a given direction.
"the velocities of the emitted particles"
(in general use) speed.
"the tank shot backwards at an incredible velocity"
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