Data Interpretation  Pie Charts
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The following piechart shows the percentage distribution of the expenditure incurred in publishing a book. Study the piechart and the answer the questions based on it.
Various Expenditures (in percentage) Incurred in Publishing a Book
Let the amount of Royalty to be paid for these books be Rs. r.
Then, 20 : 15 = 30600 : r r = Rs.  30600 x 15  = Rs. 22,950.  
20 
Central angle corresponding to Royalty  = (15% of 360)°  


= 54°. 
Clearly, marked price of the book = 120% of C.P.
Also, cost of paper = 25% of C.P
Let the cost of paper for a single book be Rs. n.
Then, 120 : 25 = 180 : n n = Rs.  25 x 180  = Rs. 37.50 .  
120 
For the publisher to earn a profit of 25%, S.P. = 125% of C.P.
Also Transportation Cost = 10% of C.P.
Let the S.P. of 5500 books be Rs. x.
Then, 10 : 125 = 82500 : x x = Rs.  125 x 82500  = Rs. 1031250.  
10 
S.P. of one book = Rs.  1031250  = Rs. 187.50 .  
5500 
Printing Cost of book = 20% of C.P.
Royalty on book = 15% of C.P.
Difference = (20% of C.P.)  (15% of C.P) = 5% of C.P.
Percentage difference  =  Difference  x 100  %  
Printing Cost  
 
=  5% of C.P.  x 100  % = 25%.  
Printing Cost 