Respuesta :

Yang100

Answer:

45.3 miles per hour

Step-by-step explanation:

1 hour=60 minutes

60/3=20

20*2=40

----------------------------

30 1/5=151/5

(151/5)/40=x/60

cross product

40*x=(151/5)*60

40x=9060/5

40x=1812

x=1812/40

x=45.3

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