Question : A can do a task in 8 days, while B can do it in 18 days. In how many days will the work be completed if they both work on alternate days, starting with B?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution :
Given: A can do a task in
B can do it in
Let the total work be the LCM of
⇒ Efficiency of A
⇒ Efficiency of B
Work done by A and B in
Work done by A and B in 10 days when they work on alternate days
Remaining work
B's work on the
So, remaining work
Time taken by A to complete
Total time taken by A and B to complete the work
Hence, the correct answer is
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