Andrei has a glass tank. First, he wants to put in some marbles, each of which has a volume of
0.04 liters. Then, he wants to fill the tank with water until it's completely full.
he uses 50
marbles, he will have to add 33 liters of water.
What is the volume of the tank?
liters
Andrei has exactly 20 liters of water. How many marbles does he need so the tank is full?
marbles