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प्रश्न
A, B and C together finish a work in 4 days. If A alone can finish the same work in 8 days and B in 12 days, find how long will C take to finish the work.
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उत्तर
A. B and C finish work together in = 4 days.
A. B and C finish work together in 1 day = `1/4`
A' one day work = `1/8`
B's one day work = `1/12`
∴ C's one day work `= 1/4 - (1/8 + 1/12)`
`= (6 - (3 + 2))/24 = 1/24`
∴ C can finish the work in = 24 days
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संबंधित प्रश्न
A is able to complete `1/3` of a certain work in 10 hrs and B is able to complete `2/5` of the same work in 12 hrs. Find:
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(ii) how much work can B do in 1 hour ?
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| Type of boat | Catch of fish in one trip (in kg) |
Speed of the boat (how far it goes in one hour) |
| Log boat | 20 | 4 km per hour |
| Long tail boat | 600 | 12 km per hour |
| Motorboat | 800 | 20 km per hour |
| Machine boat | 6000 | 22 km per hour |
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Speed of the boat (how far it goes in one hour) |
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| Long tail boat | 600 | 12 km per hour |
| Motorboat | 800 | 20 km per hour |
| Machine boat | 6000 | 22 km per hour |
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