| If the annual rate of simple interest increases from 10% to \[12\frac{1}{2}%,\] a man's yearly income increases by Rs. 1250. His principal (in Rs.) is |
A) 50000
B) 45000
C) 60000
D) 65000
Correct Answer: A
Solution :
| Change in \[SI=\frac{25}{2}-10=\frac{5}{2}\]% |
| \[\therefore \] \[\frac{5}{2}\]% of principal = Rs. 1250 |
| \[\therefore \] Principal \[=\,\,\frac{1250\times 2\times 100}{5}=Rs.\,50000\] |
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