1.

P,Q and R together can complete 50% of a work in 2 days. All three start the work but after two days Q. left. P and R alone in 8 days. In how many days can P alone complete the work?

Answer»

6
8
10
12

Solution :(i) Remaining work `=1-(P+Q+R)`' two day's work `-(P+R)`s one day work.
(iii) Let p,q nad r be the NUMBR of days taken by P,Q and R respectively.
`(iii) (1)/(q)+(1)/(p)+(1)/(r)=(1)/(4)""(1)`
`(1)/(p)+(1)/(r)=(1)/(6)""(2)`
`(3)/(q)+(2)/(q)+(11)/(r)=1 ""(3)`
(iv) SOVLE the above equations fo FIND the P


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