After three successive equal percentage rise in the salary the sum of 100 rupees turned into 140 rupees and 49 paise. Find the percentage rise in the salary. Options.
A) 12%  B) 22%  C) 66%  D) 82%  E) 77%
Solution:   We solve it through options. Choosing options for trial depends on mental thought.   100 ==12% up ==&gt;112 ==12% up ==&gt;125.44 ==12% Up ==&gt; 140.49   So, answer is 12%.   12%nswer: Option 12%
<result>A</result>
After three successive equal percentage rise in the salary the sum of 100 rupees turned into 140 rupees and 49 paise. Find the percentage rise in the salary.