Question

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Answer 1

Answer:

Question :

At what rate of interest per annum should Rita invest if she wants to grow her rupees 2500 to rupees 4000 in five years .

Answer :

$\sf\purple{Given}$

• Amount = 4000

• Principal = 2500

• Number of years = 5

$\sf\purple{To\:Find:}$

• Rate of interest = ?

Explanation :

Simple Interest = Amount - Principal

$\longrightarrow\sf{4000 - 2500}$

$\longrightarrow\sf\pink{1500}$

• Simple interest = 1500

$rate = \frac{si \: \times 100}{p \: \times n}$

here ,

• si is simple interest

• p is principal

• n is number of years

$\longrightarrow\sf{1500×100/2500×5}$

$\longrightarrow\sf{150000/12500}$

$\longrightarrow\sf{1500/125}$

$\longrightarrow\sf{12}$

• Therefore the rate of interest is 12%