Question

3000 is invested into parts the first part at 6% per annum and the second part at 5% per annum and obtain the simple interest of 160 rupees in a year how much is invested at 6% per annum?
1)2000
2)1000
3)1500
4)1200​

Answer 1

Answer:

$\frac{x \times 6 \times 1}{100} \\ + \frac{(3000 - x) \times 5 \times 1}{100} = 160$

$6x + 15000 - 5x = 16000 \\ x = 1000$

Rs 1000 is invested at 6% per annum.