To find information about the largest tsunamis over the past 10 years, it is known that the speed of propagation of a tsunami

To find information about the largest tsunamis over the past 10 years, it is known that the speed of propagation of a tsunami reaches 500 km h and the wave breaks into land for 10 km. Find the time for which the tsunami can travel this distance.

Tsunami in the Samoan Islands in 2009, Tsunami on the coasts of Chile in 2010, Tsunami in the Japanese Islands in 2011, Tsunami in the Philippine Islands in 2013, Tsunami in the Chilean city of Ikeke in 2014, Tsunami on the shores of Japan in 2015, Tsunami in Indonesia near the island of Sulawesi in 2018.
Problem: S = v / t
t = s / v
t = 10km / 500km / h = 0.02h = 1.2 min
Answer: 1.2 minutes