CBSE Class 10 Answered
plzz answer .....
Asked by kirtichawla94 | 18 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
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Answered by | 18 Feb, 2010, 05:06: PM
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