Answer:
The Principal amount for 9 % is $ 75,000 And
The Principal amount for 11 % is $ 90,000 .
Step-by-step explanation:
Given as :
The principal amount = $165000
Total interest paid = SI = $16650
The two rate of interest are 9% and 11%
The Time period of loan = 1 year
Let The Principal for 9% = $ x
And The Principal for 11% = $ 165000 - $x
From Simple Interest method
Simple Interest =

Or, 16650 =
+

Or, 16650 =
+

Or, 16650×100 = 9 x + 1815000 - 11 x
Or, 11 x - 9 x = 1815000 - 1665000
Or , 2 x = 150,000
∴ x =
= $ 75,000
And $ 165000 - $ 75000 = $ 90,000
Hence The Principal amount for 9 % is $ 75,000 And
The Principal amount for 11 % is $ 90,000 . Answer