Question

Ramu and Somu together can complete a work in 15 days. Somu alone can do that work in 20 days. In how many days A alone can complete the work?

Answer 1

Question :

ramu and balu can paint a house in 20 days . ramu alone can do it in 30 days . In how

many days can balu alone do it ?

Solution:

• Ramu and balu can do in 20 days together

• Let Ramu can do the work in x days

1 work x days

1 day. 1/x work

• Ramu works for 20 days with balu

20 days.

20/x work

• Let balu can do the work in y days alone

1 work. y days

1 day. 1/y work

• Balu works for 20 days with ramu

20 days. 20/y work

20/x + 20/y =1work

• It is given Ramu can do the work alone in 30 days

20/30 + 20/y = 1

20/y =1-20/30

20/y =10/30

20/y =1/3

y =60

In 60 days balu can do it

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ramu and balu can paint a house in 20 days . ramu alone can do it in 30 days . In how many days can balu alone do it ?

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