Question

please solve this question

Answer 1

The Principle = Rs.3500
Rate per annum = 6%
Amount = RS.4130
Amount = Simple Interest + Principle
4130 = S.I + 3500
4130 - 3500 = S.I
630 = S.I
S.I = RS.630

$simple \: interest \: = \: \frac{ptr}{100} \\ 630 = \frac{3500 \times t \times 6}{100 } \\ 630 = 35 \times 6 \times t \\ 630 = 210 \times t \\ \frac{630}{210} = t \\ 3 = t \\ t = 3 \: years$
We got Time as 3 years

Answer 2

above answer is correct so I need not solve this