Answer:
The top of the pipe is 1.6m far above the water surface.
Explanation:
Total length of the pipe= 3.1m
Length under water= 1.5m
To find the length from water surface to the top of the pipe, subtract the length under water from total length of the pipe; 3.1m-1.5m = 1.6m
Therefore, the top of the pipe is 1.6m far above the water surface.