Pooja borrowed some money at the rate of 6 per annum for the first 3 year at the rate of 9 per annum...........

Quant (SSC) Simple Interest

Pooja borrowed some money at the rate of 6% per annum for the first 3 year, at the rate of 9% per annum for the next 5 year and at the rate of 13% per annum for the period beyond 8 years. If she pays a total interest of Rs. 8160 at the end of 11 year, how much money did she borrow?

8,000

8,500

9300

1024

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Explanation:

Let the Principal be x, then
SI = P × R × T /100
According to question,
x × 6 × 3 /100 + x × 9 × 5 /100 + x × 13 × (11 – 8) /100 = 8160
⇒ 18 x + 45x + 39x /100 = 8160
⇒ 102x = 816000
⇒ x = 816000 /102 = ? 8000