1.  If for a certain quantity of books, the publisher has to pay Rs. 30,600 as printing cost, then what will be the amount of royalty to be paid for these books ?

A. Rs. 19,450
B. Rs. 21,200
C. Rs. 22,950
D. Rs. 26,150

Answer: Option C

Explanation:

Let the amount of Royalty to be paid for these books be Rs. r.
Then, 20 : 15 = 30600 : r
  r = Rs.  30600 x 15 / 20 
= Rs. 22950