Question

Find the principal.

$S.No$.	$Sl$	$Time$	$Ratep.a$	$Principal$
$a$	$Rs.392$	$3.5years$	$3.5$
$B$	$Rs.4.50$	$5months$	$4.5$

Answer 1

Time $=3.5$ years,

Rate $=3.5\%$,

S.I$=$Rs. $392$

Principal $=100\times$ S.I/Rate$\times$Time

$=100\times 392/3.5\times 3.5$

$=39200/12.25$

Principal$=3200$

Time$=5$months,

Rate$=4.5\%$,

S.I$=$Rs. $4.50$

Principal$=100\times$S.I$/$Rate$\times$Time

$=100\times 4.50/4.5\times \frac{5}{12}$

$=450/1.875$

Principal$=240$.