solution???

Asked by  | 11th Apr, 2009, 11:07: AM

Expert Answer:

Let the original price of a book = x Rs.

So, the increased price = x+10 Rs.

With the original price , the number of books that can be bought for  Rs. 1200 is 1200/x

With the increased price the number of books that can be bought for Rs. 1200 is 1200/(x+10)

Acc to question,

1200/x-1200/(x+10)=10

1200*[(1/x)-(1/x+10)]=10

1200*[10]=10*x*(x+10)

1200=x(x+10)

Solving by quadratic factorisation we get,

 x=30

So original price =Rs.30

Answered by  | 11th Apr, 2009, 11:28: AM

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