River A:

- volume flow rate: 100,000 m^3/s

- width: 5km

- Depth: 40m

River A is at merging point with river B and river C.

River B:

- width: 3km

- twice volume flow rate as river C

- depth: 40m

River C:

- width: 1km

-depth: 40m

Q1: calculate speed of river A

Q2: calculate volume flow rate for river B and C

Q3: calculate speed of river B and C