Recommended dimensions

Michael bought an aquarium in the shape of a block with dimensions of the bottom 30 cm x 15 cm and a height of 20 cm. The salesman recommended that he fill the aquarium with water only up to a height of 15 cm. How many liters of water does Michael have to fill the aquarium if he follows the seller's advice?

Correct answer:

x =  6.75 l

Step-by-step explanation:

a=30 cm dm=30:10  dm=3 dm b=15 cm dm=15:10  dm=1.5 dm d=20 cm dm=20:10  dm=2 dm d2=15 cm dm=15:10  dm=1.5 dm  1 dm3= 1 liter x=a b d2=3 1.5 1.5=6.75 l

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