a) 15
b) 16
c) 18
d) 25
Answer: b
Explanation: 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
$$x = {\frac{{4 \times 20}}{5}} $$
x = 16 days
Tanya takes 16 days to complete the work
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