RRB Group D 23-Oct-2018 Shift 3 Solved Paper

Question : 32 of 100

Marks: +1, -0

Type 1 workers are two-and-a-half times as efficient as Type 2 workers. If 12 Type 1 workers can complete a task in 10 days, how many days would it take 6 Type 1 and 10 Type 2 workers to complete the same task?

Validate

Solution:

Type 1 worker : Type 2 worker

{P}_{1}=2 {1}/{2}({P}_{2})

P_{1}={5}/{2} P_{2}

12 {P}_{1} ×10=(6 {P}_{1}+10 {P}_{2}) \×

Days

12 {P}_{1} ×10=(6 {P}_{1}+10

×{2}/{5} {P}_{1}) ×{D}

{D}={12{P}_{1} ×10}/{10 {P}_{1}}

{D}=12

days

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