I'm having a hard time solving problems on speed and time and need help?

Hello,

I'm new in town! I'm about to start an online undergrad program getting my BA. I still have trouble with math and it is my worst subject. I did fine with Algebra but everything else are cruel to me. I need help on how to figure out this problem: A train travels 20 feet in 1/5 second. At this same

speed, how many feet will it travel in three seconds?

Thank you for anyone who can help walk me in solving this.

Re: I'm having a hard time solving problems on speed and time and need help?

Quote:

A train travels 20 feet in 1/5 second

... then it would travel 100 ft in 1 whole second, wouldn't it?

Re: I'm having a hard time solving problems on speed and time and need help?

Yeah, 20 feet in 1/5 sec, 100 feet in 1 sec, 300 feet in 3 sec.

Re: I'm having a hard time solving problems on speed and time and need help?

Quote:

Originally Posted by

**Notatroll** Yeah, 20 feet in 1/5 sec, 100 feet in 1 sec, 300 feet in 3 sec.

gee, thanks for giving the OP the opportunity to think about this problem **by himself** ...

Re: I'm having a hard time solving problems on speed and time and need help?

For speed/time/distance problems, remember that $\displaystyle Speed = \frac{Distance}{Time}$

You're given that the train traveled 20 feet in 1/5 seconds. So you can plug it in the speed formula to get the speed of the train.

Now you want to know how far it will travel in 3 seconds. You can rearrange the original formula so that you have $\displaystyle Distance = Time * Speed$.

Now you can plug in 3 and the speed you got from the original formula to find the distance the train travels in 3 seconds.