RRB Group D 17-Dec-2018 Shift 1 Soled Paper

Question : 91 of 100

Marks: +1, -0

Type-1 workers are 2.25 times as efficient as Type-2 workers. 30 Type -1 workers can do a piece of work in 6.4 days. How many days would it have taken 4 Type -1 and 15 Type - 2 workers to do the same work?

Validate

Solution:

T_1=2.25T_2

30T_1×6.4=(4T_1+15T_2)×D

30T_1×6.4=(4T_1+15×{T_1}/{2.25})×D

D={30×6.4×2.25}/{24}=18

days

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