11) What is the world's deepest river?
12) Which is the second longest river in Europe?
13) Where does the Brahmaputra river originate?
14) What is the name of the largest tributary of the Mississippi River?
15) Q8 Which river forms part of the border between England and Wales?
16) Q9 How many countries does the River Danube flow through?
17) Q10 What is the main source of water for the Ganges river?
18) Q11 What is the second longest river in India?
19) What is the longest river in the world?
20) In what state does the Colorado River begin?