To answer this, convert 41 minutes to seconds and add 23 seconds to that, then divide by 60 to convert to hours.

## 41 min = 2460 seconds (+ 23 seconds) = 2483 / 60 = 41.383 minutes (0.68972 hours).

## Speed = 10km/0.68972 hr = 14.498/hr

## 14.498 kilometers = 9.008 miles.

## So the runner's average speed is roughly 9 miles per hour.

Distance, speed and time via kwout

An easy way to remember the distance, speed and time equations is to put the letters into a triangle. See illustration on the side.

The triangles will help you remember these 3 rules:

## Distance = Speed x Time

## Time = Distance/Speed

## Speed= Distance/Time

Use this Speed Distance Time Calculators to work out the calculations easily.