How many days Jeff Bezos has to work to buy a Tesla Car | Amazing Facts about Jeff Bezos | FactStar

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A can do of a work in 10 days. B can do of the work in 20 days. In how many days can both A and B together do the work?

The ratio of work efficiency of A & B is 2:5 . If A can complete a work in 10 days. In how many days the work can be completed by B and when they work together , in how many days the work would be completed ?

A can do a work in 36 days and B in 12 days. If they work to gether in how many days will they be able to do the work?

A can do a piece of work in 6 days working 8 hours a day while B can do the same work in 4 days working 10 hours a day. If the work has to be completed in 5 days, so how many hours do they need to work together in a day?