# Thread: Average Speed of Ship

1. ## Average Speed of Ship

One knot is 1 nautical mph, and 1 nautical mile is 6080 feet. If a cruiser ship has an average speed of 3.5 knots, what is the average speed, in mph, of the ship?

Also, is there an average speed formula?

2. Originally Posted by magentarita
One knot is 1 nautical mph, and 1 nautical mile is 6080 feet. If a cruiser ship has an average speed of 3.5 knots, what is the average speed, in mph, of the ship?

Also, is there an average speed formula?

$\displaystyle 3.5\ \text{kts} = 3.5 \times 6080\ \text{fph}$

$\displaystyle 3.5 \times 6080\ \text{fph} = \frac{3.5 \times 6080}{5280}\ \text{mph}$

(5280 ft = 1 statute mile)

CB

3. ## I got

Originally Posted by CaptainBlack
$\displaystyle 3.5\ \text{kts} = 3.5 \times 6080\ \text{fph}$

$\displaystyle 3.5 \times 6080\ \text{fph} = \frac{3.5 \times 6080}{5280}\ \text{mph}$

(5280 ft = 1 statute mile)

CB
I got 4.03 as the average speed.