Question
'A' alone can do some work in 24 days, 'B' alone can do
the same work in 48 days. If they work on alternate days, starting with 'B', then the work will be finished in:Solution
Let the total work be 48 units {LCM (24 and 48)} So, efficiency of 'A' = 48 ÷ 24 = 2 units/day And efficiency of 'B' = 48 ÷ 48 = 1 unit/day Work done in every 2 days (B + A) = 1 + 2 = 3 units So, work done in 32 days by 'A' and 'B' = (32 ÷ 2) x 3 = 48 units Total time taken = 32 days
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