Answer:
72 kilometers per hour = 20 meters per second
Step-by-step explanation:
Speed of tuna, v = 72 km/hr
We need to find Tuna's speed in meters per second. To convert km/hr to m/s we must use the following conversions as :
![1\ km=1000\ m](https://img.qammunity.org/2020/formulas/biology/middle-school/o87h1biz9wdk4tfk3h7gkntg1isvyro2ne.png)
And,
![1\ h=3600\ s](https://img.qammunity.org/2020/formulas/biology/middle-school/hgtwj9atqu8hrti2f055cxxmmzmo2i8vft.png)
![72\ km=72000\ m](https://img.qammunity.org/2020/formulas/biology/middle-school/txk1emarlmewvrlobepez9ly5xqbnrhfay.png)
![Speed=(72\ km)/(1\ h)=(72000\ m)/(3600\ s)](https://img.qammunity.org/2020/formulas/biology/middle-school/artq654ks5l0q9vefz9221gwr43or3vslm.png)
Speed = 20 m/s
So, Tuna's is travelling with a speed of 20 meters per second. Hence, this is the required solution.