Q:
The Simple Interest(SI) for 16 years on an amount at particular rate is Rs 10000. If the principal is doubled at an interval of every 4 years and the rate is tripled at every such in terval, find the new Simple Interest(SI)
Answer & Explanation
Answer: D) 647500
Explanation: Let New SI be X
10000/16 = X/4(1*1+2*3+4*9+8*27)
10000/16=X/4(1+6+36+216)
X=647500
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