Question

Peter cycles for 1/4 hours at a speed of 20 km/h

and for another for 1/2 hour at 16 km/h. What is his
average speed?

Answer 1

His average speed is

12 km/hr

.

Explanation:

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

Average speed

=

Total Distance

Total Time

So......

48 km

4 hr

=

12 km/hr

My source

I hope this explanation helps you!