Question

begin{tabular}{c}
( c I-S I=15 cdot 25 ) ( c I=Pleft(1+frac{R}{100}right)^{n}-P )
begin{tabular}{c}
( S I=P times n times R )
100
( C I=Pleft(1+frac{5}{100}right)^{3}-P )
( S I=frac{P times 3 times 5}{18020} )
( C I-S I=15 cdot 25 )
( Pleft(1+frac{5}{100}right)^{3}-P-frac{P times 3}{20}=15 cdot 25 )
( Pleft[(1.05)^{3}-1-frac{3}{20}right]=15 cdot 25 )
( P(0.007625)=15.25 )
( P=15.25 )
hline( P=720007625 )
end{tabular}
hline
end{tabular}

# 36. If the difference between the compound and simple interests on a certain sum of money for 3 yr at 5% per annum is 15.25, then the sum is (1) 2000 (2) 1000 (3) 1500 (4) 2500

Solution