P, Q And R Can Do A Work In 20, 30 And 60 Days Respectively. How Many

1.	P, Q And R Can Do A Work In 20, 30 And 60 Days Respectively. How Many Days Does It Need To Complete The Work If P Does The Work And He Is Assisted By Q And R On Every Third Day?
Answer» AMOUNT of work P can do in 1 day = 1/20 Amount of work Q can do in 1 day = 1/30 Amount of work R can do in 1 day = 1/60 P is WORKING ALONE and every third day Q and R is helping him Work completed in every THREE days = 2 × (1/20) + (1/20 + 1/30 + 1/60) = 1/5 So work completed in 15 days = 5 × 1/5 = 1 IE, the work will be done in 15 days Amount of work P can do in 1 day = 1/20 Amount of work Q can do in 1 day = 1/30 Amount of work R can do in 1 day = 1/60 P is working alone and every third day Q and R is helping him Work completed in every three days = 2 × (1/20) + (1/20 + 1/30 + 1/60) = 1/5 So work completed in 15 days = 5 × 1/5 = 1 Ie, the work will be done in 15 days

P, Q And R Can Do A Work In 20, 30 And 60 Days Respectively. How Many Days Does It Need To Complete The Work If P Does The Work And He Is Assisted By Q And R On Every Third Day?

Answer»

AMOUNT of work P can do in 1 day = 1/20

Amount of work Q can do in 1 day = 1/30

Amount of work R can do in 1 day = 1/60

P is WORKING ALONE and every third day Q and R is helping him

Work completed in every THREE days = 2 × (1/20) + (1/20 + 1/30 + 1/60) = 1/5

So work completed in 15 days = 5 × 1/5 = 1

IE, the work will be done in 15 days

Amount of work P can do in 1 day = 1/20

Amount of work Q can do in 1 day = 1/30

Amount of work R can do in 1 day = 1/60

P is working alone and every third day Q and R is helping him

Work completed in every three days = 2 × (1/20) + (1/20 + 1/30 + 1/60) = 1/5

So work completed in 15 days = 5 × 1/5 = 1

Ie, the work will be done in 15 days

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