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A can complete a wire fencing in 8 days and B can destroy that wire fencing in 16 days, then find out the number of days to complete half of the wire fencing if they both work simultaneously.1. 62. 73. 84. 9 |
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Answer» Correct Answer - Option 3 : 8 Given : A can complete the work in 8 days B can destroy the work in 16 days Calculations : A's one-day work = 1/8 B's one day work = 1/16 Total work for the day = (1/8) - (1/16) (B's work taken negatively because it is damaging the work) ⇒ = (1/8) - (1/16) = 1/16 One day's work = 1/16 So the total number of days = 16 Half of the work will take = 16/2 = 8 days ∴ 8 days will be taken by them to complete half wire fencing |
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