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:
Answer: (1) 16 days
Sakshi can do a piece of work = 20 days
Tanya is 25% more efficiency than Sakshi.
Then, the ratio of times taken by Skshi and Tanya = 125: 100 = 5: 4
Let be the Tanya takes X days to do the work.
Then, 5: 4 = 20/X
X = 4 X 20/5
X = 16 days.
Hence, the answer is (1) 16 days.