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A man completes of a job in 10 days. At this rate, how many more days will it takes him to finish the job?

Question:
A man completes of a job in 10 days. At this rate, how many more days will it takes him to finish the job?

[A].

5

[B].

6

[C].

7

[D].

7 1
2

Answer: Option B

Explanation:

Work done = 5
8
Balance work = 1 – 5 = 3
8 8

Let the required number of days be x.

Then, 5 : 3 = :: 10 : x     5 x x = 3 x 10
8 8 8 8
x = 3 x 10 x 8
8 5

x = 6.