Lucy cycles 8.4km in 18 minutes. work out her average speed in km/h and explain.

The answer to your question is: 28 km / h

Step-by-step explanation:

Data

distance = 8.4 km

time = 18 min

speed = ? km/h

Process

Convert min to hours

                                    60 min  1 h

                                    18 min     x

                                    x = (18 x 1) / 60

                                    x = 0.3 h

                                 speed = 8.4 / 0.3

                                 speed = 28 km / h

attachment?

step-by-step explanation:

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m