Question

rohit deposit rupee 1250 in his saving in bank account find the compound intrest earned by him in 3 year at the rate of 5% per annum

Answer 1

$\huge{\pink{\underline{\ulcorner{\star\: SOLUTION \: \star}\urcorner}}}$

Compound Interest =?

Principle amount = ₹ 1250

r = $\frac{5}{100}$

n (in years) = 3

$A = (P(1+r)^{n})$

$A = 1250\times(1+\frac{5}{100})^{3}\\\implies 1250\times(\frac{(100+5)}{100})^{3}\\\implies 1250\times(\frac{105}{100})^{3}\\\implies 1250(1.05)^{3}\\\implies 1250\times1.05\times1.05\times105\\\implies Rs\:1447.03$

$C.I. = A - Initial\: Amount\\\implies C.I. = 1447.03-1250=Rs\:197.03$

$\red{\bold{\boxed{Answer = Rs\:197.03}}}$