Question

Principal = ₹ 18500, Rate = 39/5%p.a., Interest = ₹3774, find Time.​

Answer 1

Given:-

Principal = ₹ 18500

Rate = 39/5 %

Interest = ₹3774

To Find:-

Time?

Using the formula:-

$\star \: \: \bf Time = \dfrac{100 × Interest}{Principal × Rate} \: \: \: \star$

Solution:-

$\sf Time = \dfrac{100 × 3774}{18500 × \dfrac{39}{5} }$

$\sf Time = \dfrac{100 × 3774}{18500 × \dfrac{39}{5} }$

$\sf Time = \cancel\dfrac{100 × 3774}{18500 × \dfrac{39}{5}}$

$\sf Time = 54$

$\boxed{ \therefore \: \sf Time = 54 }$

Important Formulae:-

$\sf Simple \: Interest = \sf { \dfrac{Principal × Rate × Time}{100}}$

$\sf{Principal = \dfrac{Interest \times 100}{Rate × Time}}$

$\sf \: Rate = \dfrac{Interest \times 100}{Principal × Time}$

$\sf{Amount = Principal × Interest }$