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Car travels for 15 mins at 48mph it then travels for 2 hours at 60mph it then travels for 45 mins at 40mph what is the car average speed for the whole journey

Respuesta :

cnblossom
15+120+45= 180 minutes

(48*15)+(60*120)+(40*45)=x
(720)+(7200)+(1800)=x
9720=x miles

Miles/minutes = average speed = Y
9720/180 = Y
54 = Y

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