Question

Suppose you are driving to visit a friend who lives far away. You are driving at an average rate of 55 miles per hour. You must drive a total of 295 miles. If you have already driven 20 miles, how long will it take you to reach your destination?

A) 2 hours
B) 5 hours***
C) 3 hours
D) 4 hours

Am I right? If im wrong please help me understand and get the right answer! Thank you

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Answer 1

Why do you think B is the correct answer?

Answer 2

I thought if I dived the total amount of miles that need to be driven by the number of miles per hour then subtract 20 I would get the answer...but I got a negative number. So I dived the total amount of miles that needed to be driven by the number of miles driven per hour and got 5 and something( it was a decimal). I don't know what to do to solve this.

Answer 3

Okay, so if you've already driven 20 miles and you started at 295. You subtract 295 from 20 and get 275 miles left. Then you take 60 minutes because 1 hour = 60 minutes. Multiply 60 by 5 and you get 300. Now, you take 300 and divide it by 55 (the speed you are going) when you do this what do you get?

Answer 4

By the way, you were doing it correct. When you get a decimal, you sometimes just round it and in this case you have 5.45 repeating, so round it to 5 and there's your answer. Don't doubt yourself, you did a good job!