Bhuvnesh invests an amount for n years. If the rate of interest is 25% it becomes Rs. 5000. If the rate of interest is 5% it becomes Rs. 3000. For how long it is invested?	Pick.
A) 5 B) 4 C) 3 D) 6 E) 7
Explanation :   n = ((p1-p2)/(p2r1-p1r2))*100   = ((5000-3000)/(3000*25-5000*5))*100   = (2000/50000)*100= 
<gadget id="calculator">(2000/50000)*100</gadget>
<output>4</output>
4   Answer : 4
<result>B</result>
Bhuvnesh invests an amount for n years. If the rate of interest is 25% it becomes Rs. 5000. If the rate of interest is 5% it becomes Rs. 3000. For how long it is invested?