A can do a certain job in 12 days. B is 60% more efficient

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A can do a certain job in 12 days. B is 60% more efficient

Home » Aptitude » Time and Work » Question

A can do a certain job in 12 days. B is 60% more efficient than A. To do the same job B alone would take :

1. 7 1 days
  2
2. 8 days
3. 10 days
4. 7 days

Correct Option: A

Time taken by B
= 12 × 100 = 15 = 7 1
160 2 2

Aliter : Using Rule 17,
Here, x = 12, R = 60%
Time taken by B
= x × 100 days
100 + R

= 12 × 100 days
160

= 15 = 7 1 days
2 2