“if a cyclist travels at an average speed of 3m/s-1 and turns home at an average speed of 9m/s-1 than what is the average speed of the whole journey?”
using the equation speed= distance/time
Hello, hana_102!
This is a classic Trick Question . . .
If a cyclist travels at an average speed of 3m/s
and turns home at an average speed of 9m/s,
what is the average speed of the whole journey?
We will use: .
Suppose the distance (one way) is meters.
He cycled meters at 3 m/s.
. . This took him: . seconds.
He cycled back meters at 9 m/s.
. . This took him: . seconds.
The entire trip took: . seconds (Total time).
The total distance is: . meters.
Therefore, his average speed was: .