Question
Person 'A' can finish a task in 16 days by working
alone. Person 'B', who is twice as efficient as 'A', works on the task alone for 3 days. After that, Person 'A' joins 'B'. How much time will it take to complete the task?Solution
Let the total work be 16 units. So, efficiency of 'A' = (16/16) = 1 unit/day So, efficiency of 'B' = 1 X 2 = 2 units/day Work done by 'B' alone in 3 days = 2 X 3 = 6 units Time taken by 'A' and 'B' to complete the remaining work alone = {(16 - 6)/(2 + 1)} = (10/3) days So, total time taken to complete the work = 3 + (10/3) = (19/3) days
7, -26, -45, -60, -69, -73
6.5, 11, 22, 25.5, 51, 54.5
Find the wrong number in the given number series.
216, 112, 60, 34, 21, 14
- Find the wrong number in the given number series.
5, 10, 20, 35, 80, 160 27, 35, 51, 75, 109, 147
112, 119, 133, 154, 180, 217
324, 314, 294, 264, 224, 184
Find the wrong number in the given number series.
2, 6, 24, 96, 285, 568, 567
12, 3.6, 18, 0.72, 0.432, 0.3024
Direction: Find the wrong number in given number series.
958, 954, 981, 948, 1299, 1218
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