Question
A and B together can complete a work in 20 days. After
working together for 8 days, B leaves, and A completes the remaining work in 16 more days. In how many days can B alone complete the entire work?Solution
Let the total work be W units. Work done by A and B together in 8 days = 8 × (W/20) = 2W/5 units Remaining work = W - 2W/5 = 3W/5 units A completes 3W/5 units in 16 days, so A’s 1-day work = (3W/5) / 16 = 3W/80 units A and B together complete W/20 units per day, so B’s 1-day work = (W/20 - 3W/80) = W/80 units Therefore, B can complete the entire work in 80 days.
15, 42, 56, 183, 219, 562Â
53, 57, 66, 82, 117, 143, 192
112, 125, 99, 138, 86, 153
Find the wrong number in the given number series.
29, 60, 123, 250, 515, 1016
8Â Â Â 12Â Â Â 21Â Â Â Â 36Â Â Â Â 62Â Â Â Â Â 98Â Â Â
- Find the wrong number in the given number series.
420, 369, 318, 277, 238, 225 - Find the wrong number in the given number series.
2, 6, 14, 30, 62, 126 Find the wrong number in the given number series.
3600, 1440, 576, 230.4, 92.24, 36.864
- Find the wrong number in the given number series.
5, 8, 18, 24, 37, 48 Find the wrong number in the given number series.
12, 24, 72, 216, 1440, 8640
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