a person sells a book for rs 11.he gains as many percent as its cost price in rupees. what is the cost price?
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LET THE C. P BE X. THEN P%=X%
S. P = C. P +P
11=X+((X/100)*X)
100*11=X² +100X
X²+100X-1100=0
X²+110X-10X-1100=0
X(X+110)-10(X+110)=0
(X-10) (X+110)=0
X=10.OR X=-110
AS C. P CAN'T BE NEGATIVE, THEREFORE X=10.
HOPE IT HELPS, DO MARK AS BRAINLIEST.
S. P = C. P +P
11=X+((X/100)*X)
100*11=X² +100X
X²+100X-1100=0
X²+110X-10X-1100=0
X(X+110)-10(X+110)=0
(X-10) (X+110)=0
X=10.OR X=-110
AS C. P CAN'T BE NEGATIVE, THEREFORE X=10.
HOPE IT HELPS, DO MARK AS BRAINLIEST.
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