d=rt very confused

Dylan101

New member
Joined
Jan 16, 2016
Messages
1
The question is
How long does it take in minutes to travel 15 kms in a car travelling 90 kms per hour?

I know the answer is 10 minutes, but I'm not sure of the formula.
I tried d=rt or in this case t=d/r but ended up with 0.16666
I know it has something to do with the answer in minutes and the rate in hours.
I need to do these questions in under 1 minute without a calculator for a test.
I just need someone to break it down so I can apply it to any figures.

Thank you.
 
The question is
How long does it take in minutes to travel 15 kms in a car travelling 90 kms per hour?

I know the answer is 10 minutes, but I'm not sure of the formula.
I tried d=rt or in this case t=d/r but ended up with 0.16666
I know it has something to do with the answer in minutes and the rate in hours.
I need to do these questions in under 1 minute without a calculator for a test.
I just need someone to break it down so I can apply it to any figures.

Thank you.

t = 1/6 hrs = 1/6 * 60 minutes = 10 minutes
 
Top