## RS Aggarwal Solutions Class 7 Chapter-12 Simple Interest (Ex 12B) Exercise 12.2 - Free PDF

## FAQs on RS Aggarwal Solutions Class 7 Chapter-12 Simple Interest (Ex 12B) Exercise 12.2

1. How to Download the Solution of chapter 12 simple interest of RS Aggarwal class 7?

Interested students can download the solutions of chapter 12 Simple Interest of RS Aggarwal class 7, by visiting Vedantu. They can find these solutions in the study material section on the top bar, the famous books solutions section contain the solutions to all RS Aggarwal solutions for all the class.

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**2. Write down Formulas for finding Simple Interest in the period of a year, month and day **

Like any other chapter of maths, chapter 12 simple interest also has a lot of formulas. Formulas that are used to find simple interest in various scenarios are written below

Formula to find simple interest on an amount after a certain period, when time is given in years.

Simple Interest (S.I.) = \[\frac{(P\times R\times T)}{100}\]

Formula to calculate the simple interest, when time is given in months

S.I. = \[\frac{(P\times R\times T)}{100\times 12}\]

Formula to find the simple interest, when time is provided in days

S.I. =\[ \frac{(P\times R\times T)}{100\times 365}\]

For a leap year formula changes a little 365 at the bottom becomes 366, only if the question specifies that the year is a leap year.

**3. What are the two types of interests charged by financial institutions? Explain any one of them.**

Interest on a capital amount charged by banks and other financial institutions is of two types. These two types of Interest are a) Simple Interest and b) Compound interest.

Simple Interest: Simple interest is calculated only on the original amount of capital, during a certain time with a specific interest rate. The formula to calculate simple interest is Simple Interest (S.I.) =\[ \frac{(P\times R\times T)}{100}\], where the P stands for original principal amount, R for interest rate and T for time passed.

**4. Find simple interest and the resulting amount when a loan of 3500 is given for 219 days at an interest rate of 5% per annum.**

A Loan of amount 3500 is given for a time period of exactly 219 days, with an interest rate of 5% p.a.

Here,

Principal (P) = Rs 3500

Intrest rate (R) = 5 % per annum

Time (T) = 219 days

The formula of finding simple interest, when time is given in days

Simple Interest = \[ \frac{(P\times R\times T)}{100\times 365}\] ,

or

= \[\frac{(3500\times 5\times 219)}{100\times 365}\] = \[\frac{( 35\times 219)}{73}\]=105

Hence the resulting amount will be = Principal amount + simple interest

= 3500 + 105

= 3605 rs Ans.

**5. How many questions are there in exercise 12 A?**

Chapter 12 Simple Interest of class 7 RS Aggarwal is divided into two exercises, Exercise 12 A and exercise 12 B and a test paper given at the end of the chapter. These exercises contain 25, 12 and 13 problems respectively. Exercise 12 B comprises 13 questions in total.

These questions target various aspects of Simple Interest. Questions in this chapter are of finding the final amount due after a certain period of time, with a specific interest rate. And problems finding the time required to collect a certain amount of simple interest on a specific principal amount with a fixed interest rate or calculating the principal amount, or the Interest rate, if everything else is given.