plzz answer .....

Asked by kirtichawla94 | 18th Feb, 2010, 04:52: PM

Expert Answer:

Dear Student

Say

Number of dtudents=n

Cost for heat=x

nx=240----------1

and  (n-4)(x+5)=240

==>  nx+5n-4x-20=240 -----------2

2-1  ===>  5n-4x=20==> x=5n/4 -  5 --------3

3 in 1 ===>  5n^2/4   -  5n  -240=0

5n^2  - 20n-960=0

n=2+/- 14 

so,  possible solution = 2+14=16

Regards

Team

Topperlerning.com

Answered by  | 18th Feb, 2010, 05:06: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.