whos good at maths?

sam83uk · 20 Jun 2007 at 17:18

bobs gotta run 2.4km in 12mins 20 seconds
how many kph will bob have to be running at to achieve his time (no more, no less)

yes it's british military fitness test

Glaucus · 20 Jun 2007 at 17:19

LOL

(2.4km/12mins 20 seconds) x 60

oops as it has seconds you have to do something funky..

hold on let my brain think.

easy way is to convert to seconds

(2.4 / 740) x 3600 = 11.7kmph?

sam83uk · 20 Jun 2007 at 17:21

think you're right i did it like that (12.2 minutes no messing with seconds)

VonClinkerhofen · 20 Jun 2007 at 17:22

Surely you can't divide anything by 12mins and 20 seconds

2.4/740 x 600

Glaucus · 20 Jun 2007 at 17:23

VonClinkerhofen said:
Surely you can't divide anything by 12mins and 20 seconds

2.4/740 x 600

3600

60mins x 60 seconds.

ps3ud0 · 20 Jun 2007 at 17:24

Without using a calculator about 12km/h...

ps3ud0 :cool:

VonClinkerhofen · 20 Jun 2007 at 17:25

Yeah that seems better

2.4/740 x 3600 = 11.6Kph

sam83uk · 20 Jun 2007 at 17:26

not 11.8 then LOL

Melm0 · 20 Jun 2007 at 17:29

sam83uk said:
not 11.8 then LOL

11.7

Raikiri · 20 Jun 2007 at 17:31

11.68 kph

Glaucus · 20 Jun 2007 at 17:32

11.675675675 ect ect ect

divine` · 20 Jun 2007 at 17:33

sam83uk said:
think you're right i did it like that (12.2 minutes no messing with seconds)

sam83uk said:
not 11.8 then LOL

No, because 12 minutes 20 seconds isn't 12.2 minutes.

You can't just turn seconds into a decimal like that :/

Melm0 · 20 Jun 2007 at 17:34

AcidHell2 said:
11.675675675 ect ect ect

I get 11.707317073170731 ect ect ect

Nash · 20 Jun 2007 at 17:35

Ignore!

Glaucus · 20 Jun 2007 at 17:36

Melm0 said:
I get 11.707317073170731 ect ect ect

how you manage that?

ps3ud0 · 20 Jun 2007 at 17:36

11 and 25/37ths to be exact

FYI 12 mins 20 secs = 12 1/3rd mins...

ps3ud0 :cool:

Melm0 · 20 Jun 2007 at 17:38

AcidHell2 said:
how you manage that?

12 mins 20 seconds is 12.3 minutes right? (20 seconds is a third of a minute)

Need minutes in hours so divide by 60 (12.3 / 60 = 0.205)

2.4 / 0.205

I used the microsoft calculator so it might be wrong

Edit: Beaten ^-^

Raikiri · 20 Jun 2007 at 17:39

Melm0 said:
12 mins 20 seconds is 12.3 minutes right? (20 seconds is a third of a minute)

Need minutes in hours so divide by 60 (12.3 / 60 = 0.205)

2.4 / 0.205

I used the microsoft calculator so it might be wrong

Try 12.333333333333333 ect. as it is recurring

ps3ud0 · 20 Jun 2007 at 17:40

But you brought in an inaccuracy by rounding 12 mins 20 secs to equal 12.3 which is why you are getting a slightly different answer...

ps3ud0 :cool:

divine` · 20 Jun 2007 at 17:40

AcidHell2 said:
how you manage that?

Using 12.3m instead of 12m20s at a guess.

edit: damn getting distracted