When camping alone, Mr. Adams uses all of the water in the storage barrel I. 12 days. If mrs. Adams caps with him, they use all the water in 8 days. In how many days will mrs. Adams use the water if she camps alone?

Answer:

24 days

Explanation:

for Mr.Adams

12 days ---> 1 barrel of water

1 days ---> 1/12 barrel of water

8 days ---> [(1/12)*8] = 8/12 barrel of water

For Mrs Adams in 8 days:

she uses: 1 - 8/12 = 4/12

If she camps alone:

she uses 4/12 in 8 days

to use full:

(4/12)*3  barrels in  (8*3) days

1 barrels in 24 days

She can therefore use 24 days if she camps alone.

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