Answer:
402m
Step-by-step explanation:
We can solve this easily by using the free fall formula:

On both cases the final velocity will be 0m/s (maximum height), so we have:

We know that the velocity the person imparts to the ball will be the same either on Earth or on the Moon, so we write for both cases:


Which means

So we get (taking into account that gravity on earth is 6 times gravity on the Moon):
