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rahul kumar yadav

· started a discussion

· 1 Months ago

223883 (Question: 223882.0 )

how come a 5x

Question:
A is 40% more efficent than B and B is 20% less efficent than C. If A takes 6 days less than C to complete a work, then in how many days will B complete this work ?
Options:
A) 35
B) 70
C) 105
D) 40
Solution:
Ans: (b) Let time taken by B to complete the work = 7x 

Then, time taken by C to complete the work = 5.6x

Then, time taken by A to complete work = 5x

ATQ,

5.6x – 5x = 6

0.6x = 6

x = 10

So, time taken by B = 7x

= 70 days

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