Question

Q.18. In what rate percent the
interest of Rs 3500 for 3 years
is Rs 250?​

Answer 1

Answer:

Let the rate% be r%

(3500×3×r)/100=250

10500r=25000

r=25000/10500

r=250/105

r=25/21%

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Answer 2

GIVEN :-

• Simple Interest (S.I) = Rs.250
• Time (T) = 3 years.
• Principal (P) = Rs.3500

TO FIND :-

• The rate percent (R).

SOLUTION :-

$\dag \: \boxed{ \red{ \bf \: rate = \dfrac{S.I \times \: 100}{P \times T}}}$

$\to \sf \: \dfrac{ \cancel{250}\times 100}{\cancel{3500 }\times 3} \\ \\ \to \sf \: \dfrac{100}{14 \times 3} \\ \\ \to \sf \: \dfrac{100}{42} \\ \\ \to \: \boxed{ \red{ \bf \: 2.38 \%}}$

☯ Hence the rate is 2.38 %

ADDITIONAL INFORMATION :-

$\bf{ \underline{Some Formulae}} \\ \\ \rightarrow \quad \rm P = \dfrac{100 \times S.I}{R \times T} \\ \\ \\ \rightarrow \quad \rm T = \dfrac{100 \times S.I}{P \times R} \\ \\ \\ \rightarrow \quad \rm R = \dfrac{100 \times S.I}{P \times T} \\ \\ \\ \rightarrow \quad \rm A = P + S.I \\ \\ \\ \rightarrow \quad \rm S.I = \dfrac{P \times R \times T}{100} \\ \\ \\ \rightarrow \quad \rm S.I = Amount- Principal$