Boy sells a book for Rs.450 he gets a loss of 10%, find CP of the book?  Answers
A) Rs.400  B) Rs.450  C) Rs.500  D) Rs.600  E) Rs.650
Find cost price   Let C.P. of book = x and S.P. = Rs. 450   S.P. of book = C.P. – (10% of C.P.)   S.P. = x – (0.10x)   450 = 0.9 x   x i.e cost price = Rs.500   Rs.500
<result>C</result>
Boy sells a book for Rs.450 he gets a loss of 10%, find CP of the book?