Question

in what time will rupees 1200 amount to rupees 1344 at 6% per annum?

Answer 1

SI =
$\frac{p \times r \times t}{100}$
$\frac{1200 \times 6 \times t}{100} + 1200 = 1344 \\ 72t + 1200 = 1344 \\ 72t = 144 \\ t = 2$
In two years rupees 1200 will amount to rupees 1344 at 6% per annum

Answer 2

Interest = Final - Initial
= 1344 - 1200
= 144

Interest = Principal amount * Rate * Time
144 = 1200 * 0.06 * t
144/(1200*0.06) = t
144/72 = t
2 = t

The time is two years.