Empty barrel

In the backyard is an empty barrel with a volume of 2 hl. How many liters are missing at the edge, when 53 liters flowed into it for 1 day and 68 liters of water for 2 days?

Correct answer:

V3 =  79 l

Step-by-step explanation:

V=2 hl l=2 100  l=200 l V1=53 l V2=68 l  V3=VV1V2=2005368=79 l

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