A) 6 days
B) 8 days
C) 12 days
D) 16 days
Correct Answer: A
Solution :
Let A and B worked together for x days According to the question, Part of work done by A for (x +10) days + part of work done by B for x days = 1 \[\Rightarrow \] \[\frac{x+10}{20}+\frac{x}{30}=1\] \[\Rightarrow \] \[\frac{3x+30+2x}{60}=1\] \[\Rightarrow \] \[5x+30=1\] \[\Rightarrow \] \[5x=30\] \[\Rightarrow \] \[x=\frac{30}{5}=6\,\,\text{days}\]You need to login to perform this action.
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