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- Painter A can paint a house in 16 days, and painter B can do the same work in 20 days.
Question 1:
Painter A can paint a house in 16 days, and painter B can do the same work in 20 days. With the help of painter C, they paint the house in 8 days only. Then,Painter C alone can do this task in
A. 80 days
Feedback A's 1 day's work = 1/16
B's 1 day's work = 1/20
(A + B + C)'s 1 day's work = 1/10
=> C's 1 day's work = 1/10-1/16+1/20 = 1/80
So, C can paint the house in 80 days.
B's 1 day's work = 1/20
(A + B + C)'s 1 day's work = 1/10
=> C's 1 day's work = 1/10-1/16+1/20 = 1/80
So, C can paint the house in 80 days.
B. 85 days
C. 79 days
D. 76 days
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