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CBSE Class 12-science Answered

Please solve Qno 23:
 
 
 
Asked by manasd | 24 May, 2016, 12:33: PM
answered-by-expert Expert Answer
F o r space s c h o o l space straight A
3 straight x space plus space 2 straight y space plus space straight z space equals space 1600.

F o r space s c h o o l space straight B
4 straight x space plus space straight y space plus space 3 straight z space equals space 2300

T h e space t o t a l space a m o u n t space f o r space o n e space p r i z e space o n space e a c h space v a l u e space i s space R s. space 900.
space straight x space plus space straight y space plus space straight z space equals space 900

open square brackets table row 3 2 1 row 4 1 3 row 1 1 1 end table close square brackets open square brackets table row straight x row straight y row straight z end table close square brackets equals open square brackets table row 1600 row 2300 row 900 end table close square brackets

space straight R subscript 1 left right arrow straight R subscript 3
open square brackets table row 1 1 1 row 4 1 3 row 3 2 1 end table close square brackets open square brackets table row straight x row straight y row straight z end table close square brackets equals open square brackets table row 900 row 2300 row 1600 end table close square brackets

straight R subscript 2 colon space straight R subscript 2 minus 4 straight R subscript 1 comma space space space straight R subscript 3 colon space straight R subscript 3 minus 3 straight R subscript 1 space

open square brackets table row 1 1 1 row 0 cell negative 3 end cell cell negative 1 end cell row 0 cell negative 1 end cell cell negative 2 end cell end table close square brackets open square brackets table row straight x row straight y row straight z end table close square brackets equals open square brackets table row 900 row cell negative 1300 end cell row cell negative 1100 end cell end table close square brackets

space straight R subscript 2 left right arrow straight R subscript 3

open square brackets table row 1 1 1 row 0 cell negative 1 end cell cell negative 2 end cell row 0 cell negative 3 end cell cell negative 1 end cell end table close square brackets open square brackets table row straight x row straight y row straight z end table close square brackets equals open square brackets table row 900 row cell negative 1100 end cell row cell negative 1300 end cell end table close square brackets

straight R subscript 2 colon space straight R subscript 2 cross times open parentheses negative 1 close parentheses
open square brackets table row 1 1 1 row 0 1 2 row 0 cell negative 3 end cell cell negative 1 end cell end table close square brackets open square brackets table row straight x row straight y row straight z end table close square brackets equals open square brackets table row 900 row 1100 row cell negative 1300 end cell end table close square brackets

straight R subscript 3 colon space straight R subscript 3 plus 3 straight R subscript 2
open square brackets table row 1 1 1 row 0 1 2 row 0 0 5 end table close square brackets open square brackets table row straight x row straight y row straight z end table close square brackets equals open square brackets table row 900 row 1100 row 2000 end table close square brackets
straight x plus straight y plus straight z space equals space 900............ left parenthesis straight i right parenthesis
straight y plus straight z space equals space 1100.......... left parenthesis i i right parenthesis
5 straight z space equals space 2000
therefore straight z space equals space 400............. left parenthesis i i i right parenthesis

S u b s t i t u t i n g space left parenthesis i i i right parenthesis space i n space left parenthesis i i right parenthesis space w e space g e t

straight y space plus space 2 left parenthesis 400 right parenthesis space equals space 1100
straight y space equals space 300....... left parenthesis i v right parenthesis

S u b s t i t u t i n g space left parenthesis i i i right parenthesis space a n d space left parenthesis i v right parenthesis space i n space left parenthesis straight i right parenthesis space w e space g e t

straight x space plus space 300 space plus space 400 space equals space 900
straight x space equals space 200

A w a r d space m o n e y space f o r space t h e space v a l u e s space s i n c e r i t y comma space t r u t h f u l n e s s space a n d space h e l p f u l n e s s space a r e space R s. space 200 space comma space R s space 300 space a n d space R s space 400 space r e s p e c t i v e l y.

S o c i a l space r e s p o n c i b i l i t y space c a n space b e space t h e space space o n e space m o r e space v a l u e space w h i c h space c a n space b e space c o n s i d e r e d space f o r space a w a r d.
Answered by Vijaykumar Wani | 25 May, 2016, 12:43: PM
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