Question

find principal - S.I=20 R=2% per annum T=20 months (full solution)​

Answer 1

GIVEN :-

• Principal ( P ) = ?
• Simple Interest ( SI ) = Rs. 20.
• Rate ( R ) = 2 %.
• Time ( T ) = 20 months.

TO FIND :-

• The Principal ( P ).

SOLUTION :-

⇢ Time = 20 months.

• 1 year = 12 months

⇢ Time = 20/12 years.

⇢ Time = 1.6 years.

Now Let's Apply the formula for principal,

⇒ Principal = ( simple interest × 100)/( Rate × Time)

⇒ P = ( SI × 100)/(R × T)

⇒ P = ( 20 × 100)/(2 × 1.6)

⇒ P = 2000/(2 × 1.6)

⇒ P = 2000/3.2

⇒ P = 625

Hence the required principal is Rs. 625.

Answer 2

Answer:

✯ Given :-

• Simple interest = Rs 20, Rate of Interest = 2%, Time = 20 months.

✯ To Find :-

• What is the principal.

✯ Formula Used :-

To find Principal, we know that,

$\boxed{\bold{\small{✪\: Principal\: =\: \dfrac{100 × Simple\: Interest}{Rate × Time\: }}}}$

✯Solution :-

⋆ Given :-

• Simple Interest (SI) = Rs = Rs 20
• Time (t) = 20 months = $\dfrac{20}{12}$ = 1.6 years
• Rate of Interest (r%) = 2%
• Principal (P) = ?

According to the question by using the formula we get,

⇒ P = $\dfrac{100 × 20}{2 × 1.6}$

⇒ P = $\dfrac{2000}{3.2}$

➥ P = Rs 625

$\therefore$ The Principal (P) is Rs 625 .

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