Percentage of profit earned by selling a book for $1380 is equal to the percentage loss incurred by selling the same book for $1020. What price should the book be sold to make 20% profit?  Choose the correct option
A) $1260  B) $1440  C) $1500  D) $1680  E) $2000
Let C.P. be Rs. x.   Then, (1380 - x)	x 100 =(x - 1020) x 100   1380 - x = x - 1020   2x = 2400   x = 1200   Required S.P. = 120% of 1200 = 1.20 x 1200 = $1440   Answer : $1440
<result>B</result>
Percentage of profit earned by selling a book for $1380 is equal to the percentage loss incurred by selling the same book for $1020. What price should the book be sold to make 20% profit?