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# Help me with this simple maths calculation, I don't know how to do it! watch

1. Its been quite a while since I was at school so can't work this out. Anyway if I can sprint 50metres in 7.1 seconds, assuming I maintain the same speed, how many seconds will I be able to run 60m in?

Thanks
2. It all centres around the following formula: v = d/t, where v is the velocity, d is the distance and t is the time.

You know two of these values to start with, so you can work out the velocity:

v = 50/7.1 = 7.0422...

So v = 7.0422...

Now, rearrange the equation at the top in terms of time, t = d/v. Now substitute in the known value of distance and the value just worked out for the velocity:

t = 60/7.0422... = 8.52

Thus you can run 60 metres in 8.52 seconds.
3. (Original post by inthedark1)
Its been quite a while since I was at school so can't work this out. Anyway if I can sprint 50metres in 7.1 seconds, assuming I maintain the same speed, how many seconds will I be able to run 60m in?

Thanks
Ok, so you know the distance and the time for the original distance. From this you can work out the speed (since speed=distance divided by time)
Once you have the speed, you can then work out the new time with the new distance with time=distance/speed
Let me know if you're still stuck
4. So, you know Speed = Distance / Time?

Spoiler:
Show

So if Speed = Distance / Time

Speed = 50/7.1 = 7.04 m/s

So, we now know the speed. So we'll re-arrange "Speed = Distance / Time", to become Time = Distance / Speed:

Time = 60/7.04 = 8.52 seconds.

5. (Original post by Lemur14)
Ok, so you know the distance and the time for the original distance. From this you can work out the speed (since speed=distance divided by time)
Once you have the speed, you can then work out the new time with the new distance with time=distance/speed
Let me know if you're still stuck
Ok thanks, some people have kindly told me the answer. I swear I used to be able to do these calculation!

Thanks guys.. now add in 5 hurdles to the calculation as Ive been put in a 60m hurdle race as well No one else will do it and apparantly you get a point even if you come last. Of course last will be an achievement for me Im just hoping to clear them. Well at least Ive got a time for the 60m flat even if its a bad one
6. (Original post by inthedark1)
Ok thanks, some people have kindly told me the answer. I swear I used to be able to do these calculation!

Thanks guys.. now add in 5 hurdles to the calculation as Ive been put in a 60m hurdle race as well No one else will do it and apparantly you get a point even if you come last. Of course last will be an achievement for me Im just hoping to clear them. Well at least Ive got a time for the 60m flat even if its a bad one
I'm sure you'll do great! I could never hit anything like those times...Hurdles will slow everyone down, just concentrate on getting over them rather than the speed
7. You don’t need to know any formulas for this question:

All you need to know is that:
7.1 seconds = 50 metres
Divide both sides by 5 to see how quickly you can run 10 metres, then multiply both sides by 6 since you want 60 metres. This is the most basic way to do without any formulas. You are left with 8.52

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