RRB RPF RPSF SI and CONS Model Papers 1 with solutions

Question : 10 of 120

Marks: +1, -0

X and Y can do a piece of work in 30 days. They work together for 6 days and then X quits and Y finishes the work in 32 more days. In how many days can Y do the piece of work alone?

30 days
32 days
34 days
40 days

Validate

Solution:

(d) (x + y) ‘s 6 days’ work

= ( { 1 } /{ 30 } ×6 ) = { 1 } /{ 5 }

Remaining work

= ( 1 - { 1 }/ { 5 } ) = { 4 }/ { 5 }

Now,

4/5

work is done by y in 32 days.
Whole work will be done by

y

( 32× { 5 }/ { 4 } ) = 40

days.

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