Question

15. A and B together can do a piece of work in 7 days. If A does twice as much work as B in a given time, find how
long A alone would take to do the work?
(1) 21 days
(2) 20 days
(3) 10 days
4) 10
days
(5) None of these​

Answer 1

Answer:

20 days

Step-by-step explanation:

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Answer 2

Answer:

21 Days

Step-by-step explanation:

21 Days BECAUSE there is given twice Generally twice means Double or some time triple Of Particular Number.