Raman is 25% more efficient than Aman. If Aman can complete a piece of work in 25 days, then Raman can complete the same work in how many days?
Let Aman's efficiency = 1 unit/day
=> Total work to be done = $$1\times25=25$$ units
Raman is 25% more efficient than Aman, => Raman's efficiency = $$1\times\frac{125}{100}=1.25$$ units/day
$$\therefore$$ Time taken by Raman working alone = $$\frac{25}{1.25}=20$$ days
=> Ans - (D)
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