An article is sold at 10% profit. If its cost price and selling price are less by Rs 5 and Rs 2.50 respectively and the percentage of profit increases by 5%. Find the cost price?
A. 40
B. 45
C. 60
D. 65
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10%=10:11
15%=20:23
5 2.50
(230-220)=(115-50)
10=65 ans
We can't understand sir pliz explain in detail
Let CP be x
SP will be 11x/10
Now from the question
New cp = x-5
New sp = 11x/10-2.50 = 11x-25/10
So
Sp/cp = 115/100
11x/10-5/x-5 = 115/100
11x-25/10x-50= 115/100
1100x-2500 = 1150x-5750
50x= 3250
X=65 ans(d)