Question

1. What sum will amount to 6,600 in 4 years at 8% per annum simple
interest?​

Answer 1

Answer:

p=Principal amount

n=Number of years

r=rate of interest

Total amount=p+

100

p×n×r

Total amount=6600

n=4 years

r=8% p.a

We have to find the principal amount

⇒6600=p+

100

p×4×8

⇒6600=p+

100

32p

⇒6600=p+

25

8p

⇒165000=33p

⇒p=5000

Step-by-step explanation:

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Answer 2

Given :

• Amount = Rs. 6600
• Rate = 8%
• Time = 4 years

To find :

• Amount

Solution :

⇒ In this question, we have to find the Amount.

⇒ Before, finding the Amount, let's find the Simple Interest.

Simple Interest = P × R × T/100

                         = 6660 × 8 × 4/100

                         = 53280 × 4/100

                         = 213120/100

                         = 2131.2

⇒ Now, let's find the Amount.

Amount = Principal + Simple Interest

             = 6,600 + 2131.2

             = 8731.2

Therefore, the Amount is Rs. 8731.2.

⇒ Formula used~

$\boxed {\sf \rightarrow Simple \: Interest =\dfrac{P \times R \times T}{100} }$

$\boxed {\sf \rightarrow Amount = Principal + S.I }$

Here,

• The Principal is the lent amount.
• The amount that is imposed on top of the Principal by the lender is called the Rate.
• The period given for returning the money is the Time.