1.

Anita invested Rs.8000 at 71/2 percent per annum for 2 years and 4 months.How much interest she got at the end of the period?

Answer»

GIVEN :-

<P>
  • Principal (P) = RS. 8000
  • Rate (R) = 71/2 % per annum.
  • Time (T) = 2 years 4 month

TO FIND :-

  • The simple interest (S.I)

SOLUTION :-

⇒ Time = 2 years 4 month

= ( 2 + 1/12 × 4 ) years

= ( 2 + 1/3 ) years

= 7/3 years

⇒ S.I = (P × R × T)/100

=(8000 × 71/2 × 7/3)/100

= (4000 × 71 × 7/3)/100

= (40 × 71 × 7)/3

= 6626.66

Hence simple interest is Rs. 6626.6.

ADDITIONAL INFORMATION :-

\boxed{\begin{minipage}{6cm} \\ \bf{ \underline{Some Formulae}} \\ \\ \rightarrow \quad \sf P = \dfrac{100 \times S.I}{R \times T} \\ \\ \\ \rightarrow \quad T = \dfrac{100 \times S.I}{P \times R} \\ \\ \\ \rightarrow \quad R = \dfrac{100 \times S.I}{P \times T} \\ \\ \\ \rightarrow \quad A = P + S.I \\ \\ \\ \rightarrow \quad S.I = \dfrac{P \times R \times T}{100} \\ \end{minipage}}


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