Question
A sum of Rs 8400 amounts to Rs 11,046 at 8.75% p.a.
simple interest in a certain time. What is the simple interest on the sum of 9600 at the same rate for the same time?Solution
Given - P= 8400, A= 11046, R= 8.75%, T=? SI = A-P=11046-8400=2646 SI= 2646 Now -SI = PRT/100 2646=8400×8.75×T/100 T= (2646×100)/84×875 T=(378×4)/84×5  =18/5=3.6 years so new simple interest for P= 9600, R= 8.75%, T= 3.6years then SI= (9600×8.75×3.6)/100 = (96×36×7)/8 =48×9×7 =3024 Rs
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