P can finish a work in 24 days, q in 9 days and r in 12 days. Q and rstart the work but are forced to leave after 3 days. The remaining work was done by p in:
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Let Total Work =LCM of 24,9,12 days will be 72
Work done by p in a day is 72/24 =3unit
Work done by q in a day is 72/9=8 unit
Work done by r in a day is 72/12 =6unit
A/q
Work done by q in 3 days =8x3 =24 unit & r is 6x3 =18 unit
72-(24+18)=30 unit
30 unit is left so time taken by p to complete the left work = 30/3 = 10 days.
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