Answer:
1.122 m/s
Explanation:
So usually a river with a speed of 1 meters per second can transport particle that weighs:
[tex] 1^6 = 1 kg[/tex]
If the particle is twice as massive as usual, then its weights would be 1 * 2 = 2kg
This means the river must be flowing at a speed of
[tex]2^{\frac{1}{6}} = 1.122 m/s[/tex]