Atank is to be filled with water. when the tank is one-sixth full, 130 gallons of water are added, making the tank three-fifths full. how many gallons does the tank contain when it is completely full?

300 gallons

Step-by-step explanation:

The difference between three-fifths full and one-sixth full is 3/5-1/6=13/30 of the tank's capacity. Let x be the capacity of the tank in gallons. Since 13/30 of the tank's capacity is 130 gallons, we have 13/30 x = 130. Multiplying both sides by 30/13 gives x = 300, so the capacity is 300 gallons.

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