Indian Institute of Foreign Trade 2015 Solved Paper

Question : 17 of 124

Marks: +1, -0

Three carpenters P, Q and R an: entrusted with office furniture work. P can do a job in 42 days, If Q is 26% more efficient than P and R is 50% more efficient than Q, then Q and R together can finish the job in approximately:

11 days
13 days
15 days
17 days

Validate

Solution:

(b) P can do a job in 42 days
∴ Q is 26% more efficient than P
⇒ 1.26 Q = 42

{ \Q } = { 42 }/ { 1.26 }

⇒ { 100 } /{ 3 } { \day' { \s }\;\;\;\;\;\;\;\;\;\;...(1)

1.5 R =

100/3

R =

200/9

days

\;\;\;\;\;\;\;\;\;\;...(2)

Q and R would take =

\{{100/3×200/9}/{10/3+200/9}\}

days =

40/3

days = 13

1/3

days

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