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## maths question plz............. solve this question

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### maths question plz............. solve this question

13. A person on tour has Rs. 360 for his daily expenses. If he extends his tour for 4 days he has to cut down his daily expenses by Rs. 3. Find the original duration of the tour.
bobbyprashanth

Posts: 2
Joined: Sun Nov 22, 2009 10:45 pm

### Re: maths question plz............. solve this question

Wed Dec 09 - The day this question was posted. And till now nobody cared/answered.

These forums are pretty much more like dead. (except for the Movies, TV celebrities part).

well the answer to you question :
Code: Select all
`let the money he requires a day be x // we are assuming that he uses a fixed amount a day else this question is senseless.let the number of days he took be y=> 360=xy // the money each day x the days = 360.:. x=360/y ___ @1given that if he takes 4 more days he would have to use 3 Rs less a day=> 360 = (y+4) (x-3)=> 360 = xy -3y + 4x -12=> 360 = (360/y)*y - 3y + (4*360/y) -12 --- putting @1 here=> 360 = 360 -3y + (1440/y) -12=> 360 - 360 + 12 = ((-3y^2 + 1440)/y)=> 12=((-3y^2 + 1440)/y)=> 12y = -3y^2 + 1440=> 3y^2 + 12 -1440 = 0 // bringing all to the LHS=> y^2 + 4y - 480 // dividing by 3=> y^2 + 24y -20y - 480 =0=> y(y+24) - 20(y+24) =0=> (y-20) - (y+24) = 0 .:. y = 20 or y =-24but whoah -24 cannot be a number of day - invalid  insensible so y =20  - he takes 20 days putting y=20 in @1.:. we get x=18.`

Answer: So he takes 20 days spending Rs18 per day .
Getenks

Posts: 11
Joined: Fri Feb 05, 2010 8:06 am

### Re: maths question plz............. solve this question

Is this some advertisement forum or something. What you posted was offending . What the hell are you doing ? this is a forum for logic and math. your ad was totally irrelevant and probably you need a BAN.
Getenks

Posts: 11
Joined: Fri Feb 05, 2010 8:06 am