an auditorium has 882 divided equally into 7 rows How many seats are there in each row answer with statement
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Answer:
a) 900
(b)1200
let no. of row =x
no. of seats in one row=y
total seats hence =xy
A.T.Q
x=y
also 2x .(y-10) =xy+300 •••••••1
put x=y in eq 1
substitution method
2x.(x-10)=x.x+300
2x^-20x=x^+300
x^-20x-300=0
(x-30)(x+10)=0
x=30. (10 is neglected as no. of rows cant be negative)
hence initial seats =xy
=x^
=30.30
=900
seats after new arrangement = xy+300
=900+300
=1200
Step-by-step explanation:
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