CBSE Guess Official Helpline Forum for CBSE Students, Teachers and Parents. | Educational Portals: ICSE | IGNOU | NIOS | IIT JEE | AIPMT | AIEEE | Friends |

IMPORTANT INFORMATION: To participate in this form you need to register as your CBSEGuess.com login info will not work here. Click Here to Register
## maths question plz............. solve this question
3 posts
• Page
1 of 1
## maths question plz............. solve this question13. 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 questionWed 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 ___ @1 given 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 =-24 but 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 questionIs 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
3 posts
• Page
1 of 1
Return to CBSE Class X Helpline ## Who is onlineUsers browsing this forum: No registered users and 15 guests |