# Compound Interest Class-9 RS Aggarwal ICSE Mathematics

## Goyal Brothers Prakashan Chapter-2

**Compound Interest Class-9 RS Aggarwal** ICSE Mathematics Solutions Goyal Brothers Prakashan Chapter-2. We provide step by step Solutions of Exercise / lesson-2 **Compound Interest** for ICSE Class-9 **RS** Aggarwal Mathematics .

Our Solutions contain all type Questions with Exe-2 A, Exe-2 B and Exe-2 C to develop skill and confidence. Visit official Website **CISCE** for detail information about ICSE Board Class-9 Mathematics.

**Compound Interest Class-9 RS Aggarwal** ICSE Mathematics Solutions Goyal Brothers Prakashan Chapter-2

–: Select Topics :–

** **

Note:- Before viewing Solution of Chapter -2 **Compound Interest**** Class-9** of **RS Aggarwal** Solutions. Read the Chapter Carefully then solve all example given in Exe-2 A, Exe-2 B and Exe-2 C . For more practice on The **Compound Interest** Visit ML Aggarwal **Compound Interest** Solutions or Selina Publishers Concise **Compound Interest (Without using formula) , **and Visit **Compound Interest (Using Formula) **Solutions ICSE Class-9 Mathematics Selina Solutions Chapter Also.

### Compound Interest Definition

Compound interest is the interest calculated on the principal and the interest accumulated over the previous period. It is different from the simple interest where interest is not added to the principal while calculating the interest during the next period. Compound interest finds its usage in most of the transactions in the banking and finance sectors and also in other areas as well. Some of its applications are:

**Increase or decrease in population.****The growth of bacteria.****Rise or depreciation in the value of an item.**

### Compound Interest Maths

To understand the compound interest we need to do its Mathematical calculation. To calculate compound interest we need to know the amount and principal. It is difference between amount and principal.

## Compound Interest Formula

The compound interest formula is given below:

**Compound Interest = Amount – Principal**

Where the **amount** is given by:

### Compound Interest Maths

To understand the compound interest we need to do its Mathematical calculation. To calculate compound interest we need to know the amount and principal. It is difference between amount and principal.

## Compound Interest Formula

The compound interest formula is given below:

**Compound Interest = Final Amount –original Principal**

Let us get to know the values of Amount and Interest in case of Compound Interest for different years-

Time (in years) | Amount | Interest |

1 | P(1 + R/100) (R/100) | PR100 |

2 | P(1+R100)2 | P(1 + R/100) (R/100) |

3 | P(1+R100)3 | P(1 + R/100)^{2} (R/100) |

4 | P(1+R100)4 | P(1 + R/100)^{3} (R/100) |

n | P(1+R100)n | P(1 + R/100)^{n-1} (R/100 |

### Exe-2 A **Compound Interest Class-9 RS Aggarwal** ICSE Mathematics Solutions Goyal Brothers Prakashan

#### Questions-1

Calculate………….annually.

Answer-1

#### Questions-2

Rohit……….years.

Answer-2

#### Questions-3

A man ……..Year.

Answer-3

#### Questions-4

Sudhakar ……….year.

Answer-4

#### Questions-5

A man ……………year.

Answer-5

#### Questions-6

calculate………………anum.

Answer-6

#### Questions-7

calculate………………anum.

Answer-7

#### Questions-8

calculate………………respectively.

Answer-8

#### Questions-9

calculate………….respectively

Answer-9

#### Questions-10

peter………………………2 years

Answer-10

#### Questions-11

find………………….half yearly.

Answer-11

#### Questions-12

find………………….half yearly.

Answer-12

Principal (P)= Rs 64000

Rate = 15% P A or 15/2 % Half Yearly

#### Questions-13

the simple interest………..find

………….

Answer-13

**Compound Interest Exe-2 B for ICSE Class-9 RS Aggarwal** Solutions Goyal Brothers Prakashan

#### Questions-1

calculate………………annually

Answer-1

#### Questions-2

calculate………………annually

Answer-2

#### Questions-3

how……………..respectively

Answer-3

#### Questions-4

calculate………………annually

Answer-4

#### Questions-5

find………………annually

Answer-5

#### Questions-6

if…………………rate

Answer-6

#### Questions-7

calculate……………..half yearly

Answer-7

#### Questions-8

find……………..half yearly

Answer-8

#### Questions-9

the simple………………find…..

Answer-9

#### Questions-10

what ……………..annually

Answer-10

#### Questions-11

what ……………..annually

Answer-11

#### Questions-12

on…………………7488

Answer-12

#### Questions-13

………difference……………..sum

Answer-13

Difference between C I and S I =Rs 216

Rate (R) = 12%

#### Questions-14

………difference……………..sum

Answer-14

#### Questions-15

………difference……………..sum

Answer-15

#### Questions-16

at what……………….7290………..

Answer-16

Principal=Rs 6250

Amount= Rs 7290

Time (n) = 2 Years

#### Questions-17

at what…………….annually.

Answer-17

#### Questions-18

in what…………………….annually

Answer-18

#### Questions-19

a certain sum………….annum.

Answer-19

Amount 2 years = Rs 7260

Amount 3 years = Rs 7986

### ICSE RS Aggarwal Solutions of Exercise -2 C **Compound Interest Class-9 ** Goyal Brothers Prakashan

#### Questions-1

a town……………….3 year.

Answer-1

#### Questions-2

…population…………………find…

Answer-2

#### Questions-3

…population…………………find…

Answer-3

Present Populations =176400

Rate=5%

Period(n)=2 Years

Populations after 2 Years = A

#### Questions-4

three…………………city…….

Answer-4

#### Questions-5

a farmer………………….ago

Answer-5

#### Questions-6

the population………………3 years

Answer-6

#### Questions-7

a mango…………………planted.

Answer-7

#### Questions-8

two year………………….now

Answer-8

= (4000x53x19) /(50×20)

=4028 Ans

#### Questions-9

the count………….3 hours.

Answer-9

#### Questions-10

in factory……………..annum.

Answer-10

#### Questions-11

amit…………………years

Answer-11

#### Questions-12

…value………………….find.

Answer-12

#### Questions-13

a refrigerator……………………find

Answer-13

#### Questions-14

a machine…………find

Answer-14

rate of depreciation of machine =8%

Value at the end of 2015= Rs 57500

#### Questions-15

the value……………….price.

Answer-15

–: End of **Compound Interest Class-9 RS** Aggarwal Solutions :–

Return to- **RS Aggarwal Solutions for ICSE Class-9 Mathematics (Goyal Brother Prakashan)**