Question 1
A sum of ₹15,600 is invested in two parts at 10% p.a. and 12% p.a. simple interest respectively. If the total interest earned at the end of 3 years is ₹5,184, find the sum invested at 12% p.a.
Step-by-Step Solution
CONCEPT USED
Simple Interest on Divided Investments
STEP-BY-STEP SOLUTION
Annual interest = 5184 / 3 = ₹1,728 . Let sum at 12% be x. 0.10(15600 - x) + 0.12x = 1728
1560 + 0.02x = 1728
02x = 168
$x =$ ₹8,400
FINAL