To find the difference in height, we need to determine how far above the water surface Ping started and how far he went below the water surface.
- The height of the platform is 10 meters.
- Ping reached a depth of 6 meters below the water surface.
To find the total distance from the top of the platform to the lowest point Ping reached (which is 6 meters below the water surface), we add the height of the platform and the depth:
\[ \text{Total height difference} = \text{Height of platform} + \text{Depth below water} \] \[ = 10 \text{ meters} + 6 \text{ meters} = 16 \text{ meters} \]
Therefore, the difference in height is:
A. 16 meters