If Tina's pail holds 4 gallons and Tommy's holds 2 more gallons than hers, that means Tommy's holds 4+2=<<4+2=6>>6 gallons.

If Timmy's pail holds twice as much as Tommy's 6-gallon pail, that means it holds 6*2=<<6*2=12>>12 gallons.

Therefore, in 1 trip that means all three move a total of 4+6+12=<<4+6+12=22>>22 gallons.

In three trips, that means they would move a total of 22*3=<<22*3=66>>66 gallons

# Answer

66
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Timmy, Tommy and Tina are filling up a kiddie pool in their backyard.  Each has a pail they fill with water from a house before dumping it into the pool.  If Timmy's pail holds twice as much water as Tommy's, and Tommy's holds 2 gallons more than Tina's, and Tina's is 4 gallons, how much water do the three of them fill the pool with after 3 trips each?
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66
Timmy, Tommy and Tina are filling up a kiddie pool in their backyard.  Each has a pail they fill with water from a house before dumping it into the pool.  If Timmy's pail holds twice as much water as Tommy's, and Tommy's holds 2 gallons more than Tina's, and Tina's is 4 gallons, how much water do the three of them fill the pool with after 3 trips each?
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