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Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
  • a)
    15
  • b)
    16
  • c)
    18
  • d)
    25
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient ...
Ratio of times taken by Sakshi and Tanya = 125 : 100 = 5 : 4.
Suppose Tanya takes x days to do the work.
5 : 4 :: 20 : x     x = (4 * 20/5)
 x = 16 days.
Hence, Tanya takes 16 days to complete the work.
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Most Upvoted Answer
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient ...
Efficiency of Tanya and sakshi in the ratio 1:4 hence time required 4:1 so time taken by Tanya 4/5*20=16
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Community Answer
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient ...
Efficiency of Tanya/Sakshi=5/4
Total work= Sakshi work × her Efficiency
=20×4=80
therefore Tanya can complete work in
= 80/5= 16 days
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