Question
A certain sum is invested for T years. It amounts to Rs. 400 at 10% per annum. But when invested at 4% per annum, it amounts to Rs. 200. Find the time (T)?
Answer: Option D
- We have, A1 = Rs. 400, A2 = Rs. 200, R1 = 10%, R2 = 4% Time (T) = A1 – A2 x 100 A2R1 – A1R2 = 400 - 200 x 100 = 20000 = 50 Years. 200 x 10 - 400 x 4 400
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- We have, A1 = Rs. 400, A2 = Rs. 200, R1 = 10%, R2 = 4% Time (T) = A1 – A2 x 100 A2R1 – A1R2 = 400 - 200 x 100 = 20000 = 50 Years. 200 x 10 - 400 x 4 400
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