Question

in what time will rupees 350 amount to rupees 420 at 5% annum

Answer 1

Hey friend
here is your answer

deposited amount = rs. 350
received amount = rs. 420
rate of interest = 5% p.a.
interest = rs. (420-350) = 70

as,
$si = \frac{p \times r \times t}{100} \\ 70 = \frac{350 \times 5 \times t}{100} \\ 4 = t$
so, it will take 4 years for rupees 350 amount to rupees 420 at 5% p.a.


glad to help you
hope it helps
thank you.

Answer 2

Principal=350
Amount=420 
Rate=5 percent

It increases by 5 percent per year.
5 percent of 350 =17.5
420-350=70

70÷17.5 =4


Therefore it will take 4 years for rupees 350 will to get into 420 at rate of 5 percent per annum.