Respuesta :
Let the water surface be 0.
He starts at 15 and gets to the water surface of 0 so he travels 15 meters.
He then goes 5 meters below the surface.
15 + 5 = 20 total meters.
Answer:
20m
Step-by-step explanation:
the diver starts on a platform 15m above the water surface, which we will call 0. if he goes from the platform to -5m under the water, then he would have traveled 20m.