Question (39/66)
If annual rate of simple interest increased from 10% to 12.5%, a person's yearly income increases by USD 1250. What is his principal ?(A)  USD 45,000
(B)  USD 47,000
(C)  USD 50,000
(D)  USD 52,000
Question (40/66)
Jack invested an amount of INR 12,000 at the rate of 10% per annum simple interest and another amount at the rate of 20% per annum simple interest. The total interest earned at the end of one year on the total amount invested became 14% per annum. What is total amount invested ?(A)  INR 20,000
(B)  INR 22,000
(C)  INR 24,000
(D)  INR 25,000