RRB RPF RPSF SI and CONS Model Papers 6 with solutions

Question : 38 of 120

Marks: +1, -0

Sanjay completes 40% of a work in 10 days. Sunny is 25 % more efficient than Sanjay and Dharam is 100 % more efficient than Sunny. In how many days will the work be finished if they work together?

$84 /19$
$80 /19$
$90/ 19$
None of these

Validate

Solution:

(4) Time taken by Sanjay to complete the work

= {10}/{0.4}=25

One day work of Sanjay

=1/25

Now, One day work of Sunny

=1.25/25=1/20

One day work of Dharam

=2×1/20=1/10

One day work of all three persons

= {1}/{25}+ {1}/{20}+ {1}/{10}= {19}/{100}

∴ Required time

= {100}/{19}

days

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