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A can do a piece of work in 6 days B...

This question belongs to Arithmetic Ability Time And Work
Time and Work
?

A can do a piece of work in 6 days. B is 25% more efficient than A. How long would B alone take to finish this work ?

Answer & Solution
Correct Answer: Option A
  A   :   B
Efficiency →   100% : 125%
  4 : 5
Time 5 : 4
  ×1.2↓   ↓×1.2
Actual time   6 days   $${\text{4}}\frac{4}{5}$$ days
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