Question

find the principal which will amount to rupees 4000 in 4 years at 6.25 percent per annum

Answer 1

Given that the amount is ₹4000
The time given is 4 years
And the rate of interest is 6.25%

As we know that Interest=(p×r×t)/100 {HERE WE WILL TAKE p AS p}

=p×625×4/100×100
=p×625/100×25
=p×25/100
=p/4

So the amount will be p+p/4
=5p/4

If amount is 5p/4 the principal is p
If amount is 1 the principal is 4p/5p
If amount is 4000 the principal is 4/5×4000
=>4×800
=>₹3200

I hope that the answer is correct.