contestada

David drove 70 miles in the first 1 ¾ hours of his trip. how much longer should it take him to drive an additional 120 miles if he drives at the same average speed?

Respuesta :

I18ntech

Let us first calculate the average speed of David,

Av speed = Distance traveled/ Time taken

We have, distance = 70 miles

Time = [tex] 1\frac{3}{4} [/tex] hours = 1.75 hours

Av speed = [tex] \frac{70}{1.75} [/tex]

= 40 miles/hour

Another 120 miles will be traveled in time, t = 120/40 = 3 hours

Otras preguntas