RRB Group D 19-Sep-2018 Shift 1 Solved Paper

Question : 99 of 100

Marks: +1, -0

17 trainees can do as much work as 4 experts can do in a day. It takes 12 experts and 9 trainees 5 days to dig a pond. How many trainees will one need alongside 4 experts to dig a similar pool in 15 days ?

Validate

Solution:

17 {T}=4 {E}

suppose trainee required

=x

(12 {E}+9 {T}) × 5=( {xT}+4 {E}) × 15

12 {E}+9 {T}=3 {xT}+12 {E}

3 x=9 ⇒ x=3

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