120m in 8 seconds? what is the speed?

Speed = distance /time
           = 120/8
           = 15m/s

Okay so 120m per 8 sec you are going to divide 
120 / 8 = 15
your answer is 15 
15m per sec
if you wanna double check that then you will want to go backwards 
15 x 8 = 120
there you have it your answer is correct :)
15m per sec
i really hope i helped you out in some type of way :)))