Postal or Sorting Assistants Model Paper 9 With Solutions

Question : 12 of 100

Marks: +1, -0

A can do a certain job in 12 days. B is 60% more efficient than A. How many days B alone take to do the same job?

Solution:

(a) Ratio of time taken by A and B = 160 : 100
= 8:5
Suppose. B alone takes x days to do the job then, 8 : 5 :: 12 : x
8x = 5 x 12

x={5×12}/8=7 1/2

days.

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