Answer:
1000 -liters = 1010 Newtons.
2000-liters = 2020 Newtons.
Explanation:
Given that 10 liters of seawater weigh = 101 Newtons.
We need to find the number of Newtons in 1,000-liter tank and 2,000-liter tank.
10 liters = 101 Newtons.
Dividing both sides by 10, we get

1 liter = 1.01 Newtons.
On multiplying both sides by 1000, we get
1 liter × 1000= 1.01 Newtons × 1000.
1000 -liters = 1010 Newtons.
On multiplying both sides by 2, we get
2× 1000 -liters = 2×1010 Newtons
2000-liters = 2020 Newtons.