Runner

Peter ran a speed of 12.4 km / h. After 45 minutes running he had a hiatus. The track is 31 km long. How many kilometers he still to run if he still running at the same speed?

Correct result:

x =  21.7 km

Solution:

v=12.4 t=45/60=34=0.75 s=v t=12.4 0.75=9310=9.3 x=31s=319.3=21710=21710 km=21.7 km



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