Primary one maths question???

Buchanan0204 · 7 Aug 2011 at 19:57

If it takes 22 mins 30 seconds to run 2.2miles.

What is the average speed of the runner?

Now I know, it's distance/time to find speed. It's the whole conversion thing stumping me. Blonde day!

22m 30s is 37.5% of 60 mins/1 hour

Trying to work out what to divide... argh!!!

It's giving me a headache. Any chance, someone can **** me and then give me the answer... pleaseeee.

Also...

How quickly would you have to run in order to do 2.2 miles in under 19 minutes?

Cheers

Destination · 7 Aug 2011 at 20:06

2.2/22.5*60= 5.8666 miles per hour

2.2/19*60= 6.95 miles per hour

Stringy · 7 Aug 2011 at 20:06

(60/22.5*) x 2.2 = speed in mph

*22min 30sec

edit: bah beaten, and with a more comprehensive answer

ash_scotland88 · 7 Aug 2011 at 20:36

Primary one?....more like s1!

Reaper 392 · 7 Aug 2011 at 20:39

if all else fails you can use google to convert things. just type 22 minutes and 30 seconds in hours and you got the time in hours. then do your speed/distance/time stuff

*edit*
ash, you cant seriously be comparing this to Statistics 1 in A levels can you? please tell me you mean something else by S1

ash_scotland88 · 7 Aug 2011 at 20:45

Reaper 392 said:
if all else fails you can use google to convert things. just type 22 minutes and 30 seconds in hours and you got the time in hours. then do your speed/distance/time stuff

*edit*
ash, you cant seriously be comparing this to Statistics 1 in A levels can you? please tell me you mean something else by S1

Yeah, something else.
Primary 1 is first year ever of school up in Scotland (p1 to p7)
s1 (secondary 1) is first year of high school.

Only realise chances of him meaning p1 in scottish terms would be very much nil after I posted, but ayrshire is in scotland.

Destination · 7 Aug 2011 at 21:11

He said P1 so he wouldn't seem retarded by not knowing the answer.
People have been critised before for posting maths questions which are deemed to be too easy for the level at which they were pitched.

RollerBall · 7 Aug 2011 at 21:17

I think my brain has died since leaving A level. I got an A in A level maths by quite a few marks and I just sat there staring at that...

Buchanan0204 · 7 Aug 2011 at 21:19

Hikari Kisugi said:
He said P1 so he wouldn't seem retarded by not knowing the answer.
People have been critised before for posting maths questions which are deemed to be too easy for the level at which they were pitched.

10 points to you sir! This is indeed correct.

V4NT0M · 7 Aug 2011 at 22:21

What's primary one?

Reaper 392 · 7 Aug 2011 at 23:16

RollerBall said:
I think my brain has died since leaving A level. I got an A in A level maths by quite a few marks and I just sat there staring at that...

you should have tried further maths. lovely imaginary numbers, matricies, and hideously complicated vector questions.

(if you thought the A level maths vectors were hard then i would seriously look up an FP2 or FP3 paper. i found the A level maths vector questions super simple, but some of the A level further maths vector questions went right over my head)

ash_scotland88 said:
Yeah, something else.
Primary 1 is first year ever of school up in Scotland (p1 to p7)
s1 (secondary 1) is first year of high school.

Only realise chances of him meaning p1 in scottish terms would be very much nil after I posted, but ayrshire is in scotland.

ah right, i figured you meant something else, because that was a little simple for a levels. your right about it being S1 though because thats when i started doing it in school (well, the english equivalent). i knew how to do it WAY before then though because maths was my strong point

Judgeneo · 7 Aug 2011 at 23:24

Amleto · 7 Aug 2011 at 23:35

hah, I loved that cauchy stuff. Did really well with it!

Judgeneo · 7 Aug 2011 at 23:38

Amleto said:
hah, I loved that cauchy stuff. Did really well with it!

I did ok in that exam, but looking at it now has me worried for next year :s

I was going to post a topology question as they are significantly harder, but I thought this would have a bigger scare factor to the non mathematicians

Reaper 392 · 8 Aug 2011 at 00:16

dont remember doing anything by cauchy in my further maths. is this uni stuff, or has the A level curriculum changed again?

RollerBall · 8 Aug 2011 at 00:22

Reaper 392 said:
you should have tried further maths. lovely imaginary numbers, matricies, and hideously complicated vector questions.

(if you thought the A level maths vectors were hard then i would seriously look up an FP2 or FP3 paper. i found the A level maths vector questions super simple, but some of the A level further maths vector questions went right over my head)

Tbh, I sucked at maths. Despite coming out with 90s in quite a few papers I really did suck at maths. Maths A level is a bit of a joke nowadays.

My mental maths is SO poor. Sure, I understand concepts easily but it's just learning a process. Anybody willing to put in an hour or two can easily get an A in maths A level.

Reaper 392 · 8 Aug 2011 at 00:31

RollerBall said:
Tbh, I sucked at maths. Despite coming out with 90s in quite a few papers I really did suck at maths. Maths A level is a bit of a joke nowadays.

My mental maths is SO poor. Sure, I understand concepts easily but it's just learning a process. Anybody willing to put in an hour or two can easily get an A in maths A level.

thats why i did further maths. one of my friends asked if he could do further maths, but the teacher said that although he was predicted an A in normal maths, he'd be lucky not to get ungraded in further maths.

also, dont worry about having poor mental maths. my mental maths sucks ass, but give me a pen and paper and i can do sums with the best of them.... right up to my inevitable silly mistake. i still remember the comment on one of my pieces of further maths homework where i'd made my customary silly mistake. the teacher wrote: "in most mathematical circles it is widely accepted that 1*1 does infact equal one"

i'd misread the * sign as a plus and put 2 :rolleyes:

DefiantAsh · 8 Aug 2011 at 00:38

Speed = Distance/Time

That how i remember it, it kinda sticks

ThePirateHulk · 8 Aug 2011 at 03:48

I still don't understand what P1 means in the context of this post as I also ready it to mean Primary 1 (ie 5 year olds).

JonJ678 · 8 Aug 2011 at 05:04

Questions like the OP are best dealt with by writing them out in full, that is including units. You have a distance and a time, so speed is the former over the latter. As you want it in mph, change the time into hours and the distance into miles (not needed in this case).

22 mins 30 seconds to run 2.2miles.

______2.2 [ miles ]_______
22.5 [mins] * [1 hr / 60 mins ]

The [mins] and 1/[mins] parts cancel, to leave [miles] / [hours]. You still have to multiply the numbers together, but at least there's no doubt remaining as to where the 60 goes. A bit overkill for this, but if dealing with a mix of imperial and metric it's a way of minimising errors.

Reaper 392 said:
dont remember doing anything by cauchy in my further maths. is this uni stuff, or has the A level curriculum changed again?

It's complex analysis, i.e. calculus applied to imaginary numbers. Well beyond A levels. It's either at the start of a maths undergrad or a couple of years into physical science, albeit with rather different emphasis in each case.