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Bharti Kushwaha

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· 1 Months ago

ABOUT TESTS (Question: 118192.0 )

all the tests have just the same questions as previous test. And also in the test many questions are repeated again and again. i am totally disappointed with this kind of service.
and also i have decided that i will not purchase any more test series from this site toprankers.. its just making us fool and also wasting our money as well as time.

Question:
A mother is 3 times faster than her daughter. If the daughter completes a piece of work in 15 days, how long will it take for both mother and daughter to complete the same work?
Options:
A) \(\cfrac{13}{4}\) days
B) \(\cfrac{15}{4}\) days
C) \(\cfrac{17}{4}\ \) days
D) \(\cfrac{19}{4}\ \)days
Solution:
Daughter’s one day work = \(\cfrac{1}{15}\)
Mother’s one day work = \(\cfrac{1}{5}\)
Both can complete their work =\(\cfrac{1}{5}+\cfrac{1}{15}\) 

                                          \(=\cfrac{3+1}{15}=\cfrac{4}{15}\)
Hence, required days=\(\cfrac{15}{4}\ days\) .

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