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The aquarium was full of water. A girl has tipped it on its side so five liters are left. How much water does the aquarium hold when it is full of water? (100\%100% indicates full volume of the tank where 20\%20% indicates only 20\%20% of the volume of the tank. )

 

 Jul 12, 2020
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80% of the tank holds 10litres, so 20% of the tank will hold 10/4 = 2.5 litres; hence a full tank holds 12.5 litres.

 Jul 12, 2020

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