Can you give some problem upon dimensional analysis?

Let us convert 10 miles per hour into meters per second. First we know that we have to transfer from the US Imperial measurement system to the Metric system. We can use the values of 1 mile = 1.609 Kilometers. 10 miles X (1.609 km/1 mile) = 16.09 km. Now we need to turn this into meters. 1 km = 1000 m. 16.09 km X (1000 m / 1 km) = 16090 m. We now have meters per hour. Now we need to get meters per second. 1 hour = 3600 seconds. 16090 m/hr X (1 hr/ 3600 sec) = 4.469 meters/second.