Mathematics (F.Sc)

Q:

(a) :  A
(b) :  B
(c) :  C
(d) :  D
Answer:  C
Explanation:  
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Q: A works thrice as fast as B. If B can complete a work in 18 days. Then number of days taken by A and B working together to complete this work is

(a) :  8 days
(b) :  9 days
(c) :  5 days
(d) :  4.5 days
(e) :  none
Answer:  4.5 days
Explanation:  

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