A And B Can Finish A Work 30 Days If They Work Together. They Worked

1.	A And B Can Finish A Work 30 Days If They Work Together. They Worked Together For 20 Days And Then B Left. A Finished The Remaining Work In Another 20 Days. In How Many Days A Alone Can Finish The Work ?
Answer» Amount of WORK DONE by A and B in 1 day = 1/30 Amount of work done by A and B in 20 days = 20 × (1/30) = 20/30 = 2/3 Remaining work – 1 – 2/3 = 1/3 A completes 1/3 work in 20 days Amount of work A can do in 1 day = (1/3)/20 = 1/60 => A can COMPLETE the work in 60 days Amount of work done by A and B in 1 day = 1/30 Amount of work done by A and B in 20 days = 20 × (1/30) = 20/30 = 2/3 Remaining work – 1 – 2/3 = 1/3 A completes 1/3 work in 20 days Amount of work A can do in 1 day = (1/3)/20 = 1/60 => A can complete the work in 60 days

A And B Can Finish A Work 30 Days If They Work Together. They Worked Together For 20 Days And Then B Left. A Finished The Remaining Work In Another 20 Days. In How Many Days A Alone Can Finish The Work ?

Answer»

Amount of WORK DONE by A and B in 1 day = 1/30

Amount of work done by A and B in 20 days = 20 × (1/30) = 20/30 = 2/3

Remaining work – 1 – 2/3 = 1/3

A completes 1/3 work in 20 days

Amount of work A can do in 1 day = (1/3)/20 = 1/60

=> A can COMPLETE the work in 60 days

Amount of work done by A and B in 1 day = 1/30

Amount of work done by A and B in 20 days = 20 × (1/30) = 20/30 = 2/3

Remaining work – 1 – 2/3 = 1/3

A completes 1/3 work in 20 days

Amount of work A can do in 1 day = (1/3)/20 = 1/60

=> A can complete the work in 60 days

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