There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of $ 12,000 after 3 years at the same rate?
Options.
A) 2160	B) 3120	C) 3972	D) 6240	E) None of these
Let P = $ 100. Then, S.I. $. 60 and T = 6 years.   R = 100 x 60 = 10% p.a.   100 x 6   Now, P = $ 12000. T = 3 years and R = 10% p.a.   3972I = 3972   ANSWER 3972
<result>C</result>
There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of $ 12,000 after 3 years at the same rate?