Answer:
v = 2 m/s
Explanation:
Given that,
Distance covered, d = 90 meters
Time, t = 45 seconds
Let v is the speed. It is equal to distance covered divided by time taken. So,

So, the speed is 2 m/s.
Answer:
A.the supply of water to land or crops to help growth, typically by means of channels.
B. he process of washing out an organ or wound with a continuous flow of water or medication.
Explanation:
I didnt know which one you wanted so here you go have a nice day.
Arouung 1950s .... :)
im not sure tho