Aman borrowed a sum of money and argues to pay rs4820 at the end if 2nd year and rs4200 at the end of the 3rd year to clear the debt it is compounded annually at 5% per annum .find the sum

i dony know

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have