A alone can complete a work in 15 days and B alone in 10 days. Starting with A, they work on alternate days. The total work will be completed in:
A alone can complete a work in 15 days and B alone in 10 days. Starting with A, they work on alternate days. The total work will be completed in:
1). 11
2). 13
3). 12
4). 14
1 answers
A can complete the work in 15 days.
⇒ A’s 1 day’s work = 1/15
B can complete the work in 10 days.
⇒ B’s 1 day’s work = 1/10
According to problem A and B work on alternate days.
⇒ Their 2 day’s work = (1/15) + (1/10) = 1/6
[? A works on 1st day and B works on 2nd day]
⇒ Their (6 × 2 =) 12 day’s work = 6 × (1/6) = 1
∴ The total work will be completed in 12 days.
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