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A man sells 12 articles for Rs. 80 gaining 33 1/3%. Find the number of articles bought by the man for Rs. 90. - Mathematics

Sum

A man sells 12 articles for Rs. 80 gaining `33 1/3%`. Find the number of articles bought by the man for Rs. 90.

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Solution

S.P. of 12 articles = Rs.80,

Gain =`33 1/3%=100/3%`

C.P. =`100/((100+"Gain"))xx"S.P."`

`=100/(100+100/3)xx80=100/((300+100)/3)xx80`

 

`=100/(400/3)xx80=100xx3/400xx80="Rs."60`

Rs.60 is the cost of 12 articles

Rs. 1 is the cost of =`12/60` article

Rs.90 is the cost of =`12/60xx90`

`=1/5xx90=18`

Man can buy an article for Rs.90 = 18

Concept: Concept of Discount
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 8 Profit, Loss and Discount
Exercise 8 (C) | Q 3 | Page 95
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