Re: (GRE Success! ) time & Work Problems

Hello Dear Srihari and all,

Everyone seem to be sleeping... Its for long i did not have a look at such questions. Just maybe i can give a hint..

1. Assuming day as 24 Hours. After one day the pool is filled 1/5 and 1/3 by pipe A and B respectively. So in total 8/15 is filled while 7/15 is left empty. To fill 7/15 pipe A will further need 5x7/15 =2.33 days....means total 3.33 days or 80 hours----maybe right or wrong...Grade 5/6 question

2. In this part distance between the two trains is missing....for such problem one can use equation of speed/velocity for both trains. Effectively the combine speed is 120mph....both lengths sum up to 800m and say they are 400m apart...then they need to travel 1200m..assume both start at same time then 1200m= 120t => t=10h. I assume meter/h other units u can change as u like.---
3. Here can use some very simple geometry and form two equations after u draw the figure...my answer come to be 40 ...maybe wrong but someone else may answer u too..

Sorry if i did some calculations wrong..

BR/Nowshad


________________________________
 From: gurramvenugopal90 <[email protected]>
To: [email protected] 
Sent: Friday, December 7, 2012 7:50 AM
Subject: Re: (GRE Success! ) time & Work Problems
 

  
Yeah i need the solutions for these Problems

--- In [email protected], Srihari Yamanoor <yamanoor@...> wrote:
>
> Hello,
> 
> These appear to be standard time and work problems. These are typically not
> the kind you would see on the GRE. Do you still need help solving them?
> 
> Srihari
> 
> 
> On Tue, Nov 27, 2012 at 10:42 PM, gurramvenugopal90 <
> gurramvenugopal90@...> wrote:
> 
> > **
> >
> >
> > 1.Pipe A can fill a pool in 5 days and pipe B can fill the pool in 3 days
> > .if they start working together at same time,how long(in hours) will it
> > take to fill the pool. if pipe B stops working after a DAy??
> >
> > 2.if 2 trains, each 400m long, travel on parallel tracks at a speed of 90
> > mph in 30mph towards each other, then how long will it take to cross each
> > other in seconds
> >
> > Geometry
> >
> > 1.two squares of 6 cm intersect each other to form a regular octagon,find
> > the perimeter of regular octagon
> >
> > Please can any one Provide the solutions for this Problems
> >
> > 
> >
> 
> 
> 
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