# Bob roller skates 48 km in 4 hours. What is his average speed in kilometers per hour?

His average speed is

Remember the triangle of Speed, Distance and Time. If you remember it, you'll ace these kinda questions.

I had trouble with these formulas but the triangle helped me a LOT! Anyways, let's get back to the question. The formula for *average* speed is pretty much the same as the formula for *just* speed. The average speed formula is

So......

My source

I hope this explanation helps you!

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Bob's average speed can be calculated by dividing the total distance he traveled by the total time taken. Therefore, Bob's average speed is ( \frac{48 , \text{km}}{4 , \text{hours}} = 12 , \text{km/h} ).

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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