1.

X and Y can do a piece of work in 4 days and 6 days resepectively. If Y works on the first day and they work on alternate days, in how many days will twice the amount of work be complete?

Answer»

`9(2)/(3)`
`10(2)/(3)`
`9(1)/(5)`
`9(1)/(2)`

Solution :Find the work done by X and Y in a period of two days.
(i) The amount of work done by P and Q in one day in 40% of `(1)/(7) and 90% (1)/(9)`
(ii) The amount of work done by P and Q in one of is 70% of `(1)/(7)` and 90% of `(1)/(9)` respectively.
(III) Now find the part of work doneby P,Q adn R in one day and PROCEEDS.


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