# Homework Help: Average speed without time

1. Sep 23, 2009

### monkeycrazy15

1. We drive a distance of 1 kilometer at 14 km/h. Then we drive an additional distance of 1 kilometer at 30 km/h. What is our average speed?

2. average speed= total distance / total time

3. 22mp/h

2. Sep 23, 2009

### Furby

If your velocity is 14km/h, then if you drove a distance of 14km it would take you 1 hour, as I'm sure you're aware. Thus if you only drove a distance of 1 km . . .

What is the formula for velocity? Think about the dimensions (units) of velocity.

3. Sep 23, 2009

### monkeycrazy15

the formula for velocity is

v= distance / time

and i think the 14 km/h is regarding the speed

4. Sep 23, 2009

### Furby

Yes, you're right. I tend to use velocity as synonymous with speed, which isn't correct. Often it will be negligible, though.

Speed=Distance/Time

Just plug and crank, now.

5. Sep 23, 2009

### monkeycrazy15

but i dont know how to find the time

6. Sep 23, 2009

### Furby

Speed=Distance/Time