SP of a book is Rs. 450 he gets a loss of 10%, find CP of the book?  Select the correct option:
A) Rs.300
B) Rs.450
C) Rs.500
D) Rs.600
E) Rs.640
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>
SP of a book is Rs. 450 he gets a loss of 10%, find CP of the book?