On what sum will the compound interest for 2 1⁄2 years at 10% amount to Rs. 31762.5?	Answers:
A) Rs.5000
B) Rs.30000
C) Rs.25000
D) Rs.20000
E) Rs.30000
Explanation:   P(1+10/100)2 × (1+(1/2×10)/100) = 31762.5   P(11/10)2 × (21/20) = 31762.5   P = (31762.5 × 20 × 10 × 10)/(21 × 11 × 11)   = (1512.5 × 20 × 10 × 10)/(11 × 11)   = (137.5 × 20 × 10 × 10)/11   = 12.5 × 20 × 10 × 10 = Rs. 25000   Answer: Option Rs.25000
<result>C</result>
On what sum will the compound interest for 2 1⁄2 years at 10% amount to Rs. 31762.5?