Percentage of profit earned by selling a book for $2200 is equal to the percentage loss incurred by selling the same book for $1800. What price should the book be sold to make 25% profit? Choose the most appropriate option.
A) $2250
B) $2100
C) $2500
D) $2700
E) $3000
Let C.P. be Rs. x.   Then,(2200 - x)	x 100 =(x - 1800)x 100   2200 - x = x - 1800   2x = 4000   x = 2000   Required S.P. = 125% of Rs. 2000 = 1.25x 2000 = $2500   Answer : $2500
<result>C</result>
Percentage of profit earned by selling a book for $2200 is equal to the percentage loss incurred by selling the same book for $1800. What price should the book be sold to make 25% profit?