Question

,
4. Find R, if P=z 450, T= 3 years and simple interest = 189.​

Answer 1

Answer:

R =14

Step-by-step explanation:

SI = P×R×T÷100

189 = 450 × 3 × R ÷ 100

189 = 1350 ÷ 100

189 = 27÷ 2

189 ×2 ÷ 27 = R

14 = R

Answer 2

➤ Given :-

Principle :- ₹ 450

Time :- 3 years

Simple Interest :- ₹ 189

➤ To Find :-

Rate of interest for the given sum.......

➤ Formula required :-

$\tt \Large \red \bigstar \: \orange{ \boxed{ \gray{ \tt SI \times 100 \div P \times T}}} \: \red \bigstar$

➤ Solution :-

Here,

SI = Simple Interest

P = Principle

T = Time

Now,

$\tt \to \dfrac{189 \times 100}{450 \times 3}$

$\tt \to \dfrac{189 \times \cancel{100}}{ \cancel{450} \times 3} = \dfrac{189 \times 10}{45 \times 3}$

$\tt \to \dfrac{ \cancel{189} \times 10}{45 \times \cancel{3}} = \dfrac{63 \times 10}{45 \times 1}$

$\tt \to \cancel \dfrac{630}{45} = 14 \bf\%$

$\Huge\therefore$The rate of interest is 14 $\bf\%$

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$\dashrightarrow$ Some related formulas :-

Simple Interest :- $\boxed{\tt P \times R \times T \div 100}$

Time :- $\boxed{\tt SI \times 100 \div P \times R}$

Principle :- $\boxed{\tt SI \times 100 \div R \times T}$