Answer:
Can you show a picture? Or like tell us the options?
Letter A
because we should add the two smaller number in the radical and if the sum equals to the other one. Then, it is a right triangle
Answer:

Step-by-step explanation:
See attached file for complete work.
2/3km........2/3 h
x km............1 h
x=2/(2/3)=6 km/h
The answer is 1/16
in decimal form its 0.0625
in percentage form its 6.25%