Question

In a swimming race, Miho swam the first 50 m in 42 s. She swam the second 50 m in 40 s. What was Miho's average speed during the race?

a.1.22 m/s

b.1.25 m/s

c.1.19 m/s

d.0.82 m/s

Answer 1

the answer is d) 0.82 m/s

Answer 2

The correct option is a.
`1.22(m)/(s)`

Step-by-step explanation:

In order to find the average speed of Miho during the race we can use the following equation :

`AverageSpeed=(TotalDistance)/(ElapsedTime)` (I)

The total distance that Miho swam is the sum of :

`50m+50m=100m`

The total elapsed time is the sum of :

`42s+40s=82s`

If we replace the data found in the equation (I) :

`AverageSpeed=(100m)/(82s)`

`AverageSpeed=1.22(m)/(s)`