math help- anyone to solve this is a genious

well its not even so im too lazy to figure it out XD 

Below - 20/3 hours Above - 35/6 hrs

Edit: Do I get a cookie?

It seems that you are missing information. How do we know what percentage of time the sub spent on the surface and under water? We can only guess.FragStains

that's the point ;)

its basicly a guess and check problem 

Below - 20/3 hours Above - 35/6 hrs

Edit: Do I get a cookie?

jerami

I want one too!

[QUOTE="jerami"]

Below - 20/3 hours Above - 35/6 hrs

Edit: Do I get a cookie?

CrimzonTide

I want one too!

Okay don't take my word on this cause I suck at algebra.

What I think you do is set up an equation.

x=time travelled underwater

(12.5-x) = time traveled above water (both of these are interchangable, you could use either one to represent one of the times, it doesn't matter)

so now set up an equation

10x + 16(12.5-x) = 160

10x + 200 -16x = 160

40 = 6x

x = 40/6

Now plug it back into the times. (x and 12.5-x)

40/6 = 6 2/3 hr travelled under water = 6 hr 40 min

12.5-40/6 = 5.83333 hr travelled above water = 5 hr 50 min

Ta da!

[QUOTE="FragStains"]It seems that you are missing information. How do we know what percentage of time the sub spent on the surface and under water? We can only guess.chip_money

that's the point ;)

its basicly a guess and check problem 

It's not a guess an check problem, it's just a system of equasions/substitution problemjerami

for me its guess and check :P I'm too lazy to look up a formula 

It's not a guess an check problem, it's just a system of equasions/substitution problemjerami

[QUOTE="jerami"]It's not a guess an check problem, it's just a system of equasions/substitution problemchip_money

for me its guess and check :P I'm too lazy to look up a formula 

I went and checked my answer, I'm positive it's right (my process, I always could've made an arithmetic error). That's how you do it.