A) \[1/4\]
B) 1 /10
C) 7/15
D) 8/15
Correct Answer: D
Solution :
(d): Work done by A + B in 1 days \[=\frac{1}{15}+\frac{1}{20}\]. Work done by A + B in 4 days = \[=4\left( \frac{1}{15}+\frac{1}{20} \right)=\frac{28}{60}=\frac{7}{15}\]work. \[\Rightarrow \] work left = 8/15 part.You need to login to perform this action.
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