Mary runs 10km in 40 minutes. What is her average speed in m/s

[almost__overnow]

Mary runs 10 kilometers in 40 minutes. What is her average speed in meters per second?

i don't understand and its only like the 4th day of school.

 

[lightgrav]

do you know what speed is?

do you know how a kilometer is related to a meter?
do you know how a second is related to a minute?