[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 3 KB, 126x115, 1291382399625.jpg [View same] [iqdb] [saucenao] [google]
2567977 No.2567977 [Reply] [Original]

/sci/, I'm tripping balls, some kid just asked me this on Omegle, and as someone studying maths in uni, my mind was blown.

Train A travels 20mi/h slower than Train B. It takes Train A 30 minutes longer than Train B to travel 200 miles. How long does it take Train A to make the 200 mile trip?

I can rearrange and find T from a quadratic, but it comes out to be a decimal, surely with a problem like this it must be an integer? Help me and this kid out, /sci/

>> No.2567984
File: 27 KB, 429x410, 1255575957808.jpg [View same] [iqdb] [saucenao] [google]
2567984

>as someone studying maths in uni

>> No.2567987
File: 39 KB, 500x340, tsafisting.jpg [View same] [iqdb] [saucenao] [google]
2567987

innegrate it

>> No.2567993

>>2567984
>implying I'm not doing a double degree in physics and mathematics

>> No.2568205

train a takes 2.5 hours

also I'm high as fuck on shrooms

>> No.2568210

>>2568205
I meant train A takes 2.5 hours

>> No.2568245

x=y-20

y(T)=200

(T+.5)x=200

((200/y)+.5)(y-20)=200

.5y^2-10y-4000=0

solve for y and you get 100 then figure out the rest of the variables.

>> No.2568274

>>2568245
also I posted this and I'm a community college student studying History.Me and you should switch majors OP. Also I did this while on shrooms so it took quite a while but I got it.

>> No.2568309

>>2567977
>implying this isn't your homework
>implying you're in uni
>implying I won't report your silly homework thread