Question

The simple interest and compound interest (compounded yearly) on a sum Rs. ‘P’ at ‘r%’ p.a. for two years are Rs. 18,000 and Rs. 19,350, respectively. If the same principal is invested at simple interest of (r + 9)% p.a., find the interest earned in 27 months.

A Rs.32,000
B Rs.42,500
C Rs.32,400
D Rs.52,455
E None of these
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