Hi is there anyone who can help me do an equation with this words i need to find how long it will take a tsunami to hit this 3 communities -Kamaishi, iwate

-Shiogama

-Ishinomaki

Its area is 377,600 square miles (978,000 square km). It has a mean depth of 5,748 feet 1,752 metres and a maximum depth of 12,276 feet (3,742 metres). The Seas of Japan and Okhotsk.

where speed (meters/second) = square root of g (acceleration due to gravity, which is 9.81 meters/second2) x d (water depth in meters)