Can some1 plz help me with my science/math question?

Question

I need to pick an athlete from the olympics and i picked michael phellps. I need to find how fast he swims. His first race was last night, and he did 400 meters in 4 minutes and 3 seconds. My teacher said you have to divide the distance in meters by the seconds and you get the mph but i kept getting weird answers on my calculator. Can some1 plz help give me the answer or explain? Thanks

Answer 1

Perhaps your first error is that you might not have converted it from meters to miles (assuming mph refers to miles per hour, not meters per hour).:

Here is the math I did

1) converted the meters to miles and the min to seconds

So he did .2485 miles in 243 seconds

2) converted it into miles per second

.2485/ 243= .001022 miles per second

3) The I multiplied it by 60 for miles per min=. 061358

4) Then Multiplied it by 60 again for miles per hour.

My answer was 3.681 miles per hour.

Cheers!