Question

A certain sum of money amounts to 19,680 in 7 years at 15% per annum simple interest
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Answer 1

Answer:

Step-by-step explanation:

Given Amount = ( p + i ) = 19,680

Time = 7 yrs

Rate of interest = 15%

Solution:

→ Amt = p( 1+it )

→ $\bold{19680 = p( 1 + \frac{15}{100}*7)}$

→ $\bold{19680 = p( 1 + \frac{105}{100})}$

→ $\bold{19680 = p( \frac{205}{100})}$

→ $\bold{\frac{19680}{p} = ( \frac{205}{100})}$

→ $\bold{205p = 19,68,000}$

→ $\bold{p = 9,600}$

The principle amount = 9,600

Answer 2

Answer:

$\huge\colorbox{pink}{Answer}$

• Question

➝ A certain sum of money amounts to 19,680 in 7 years at 15% per annum simple interest.

• To Find

→ Principle

• Solution

☞ To found amount

☞ X + Interest = Amount

☞ X + X × 0.15 × 7 = 19680

☞ X = 19680/2.05 =9600

Therefore, principle invested = 9600

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