algebra

shelby_lynn_:

Anthony is driving at a constant speed of 47.5 miles per hour. About how many hours will it take him to drive 247 miles?

Anthony drives 47.5 miles in 1 hour,

so he drives 1 mile in 1/47.5 hour.

Then we can calculate that 247 miles takes 247/47.5 hours.

247/47.5 = 5.2 hours.

Reinout

So, if Anthony is driving at a speed of 47.5 mph with no acceleration, how long will it take him to travel 247 miles?


Let Anthony's speed = a
Let distance = b
Let time needed to travel b miles = c

We know that:

a = 47.5 mph
b = 247 miles

We need to figure out c (time needed to travel b miles).


Figuring out how many hours is simple; we don't need to convert anything.

Now:

b / a = c

Why?

247 miles in total and 47.5 miles every hour means that the number of hours is the total divided by the speed.

247 / 47.5 = exactly 5.2 hours.

Answer = 5.2 hours



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