A girl sold a book at a profit of 7%. Did she sold it for Rs.7.50 more, 22% would have been gained. Find the CP?
Choose the correct choice from the following answers
A) 30%	B) 40%	C) 50%	D) 55%	E) 60%
50%   50%
<result>C</result>
A girl sold a book at a profit of 7%. Did she sold it for Rs.7.50 more, 22% would have been gained. Find the CP?