Model Activity Task Class 7 Maths subject has been released by the School Education Department of West Bengal . Here you will find the answers of the Model Activity Task Class 7 maths with full answers and proper explanation .

## Model Activity Task Class 7 Maths

Model Activity Task are very important for the students of School of West Bengal . These Model Activity Task are useful to know how much knowledge a student has acquired . Here you will get Model Activity Task Class 7 Maths Subject Solutions of the February Month .

Model Activity Task Class | Class 7 |

Model Activity Task Subject | Maths |

Time Period | February 2022 |

Language | English |

Download Questions pdf (Answer is provided below this table ) | CLICK HERE |

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## Model Activity Task Class 7 Maths February 2022 Solutions

The below are the answers and explanation of each and every question of Model Activity Task Class 7 Maths Subject for the Month of February 2022.

**Model Activity TaskClass – VIIMathematicsFull Marks : 20**

**Q1. Choose the correct answer :****(i) The simplest form of 9 : 15 is**

(a) 18 : 30

(b) 9 : 1

(c) 1 : 15

(d) 3 : 5**Answer and Explanation : **Option **[d] “ 3 : 5” **is the Correct Answer**(ii) There are 36 boys and 28 girls in a class. The ratio of girls to boys is**

(a) 9 : 9

(b) 7 : 9

(c) 9 : 14

(d) 18 : 7**Answer and Explanation : **Option **[b] “7:9” **is the Correct Answer**(iii) On comparing 5 : 15 and 2 : 3 , We find that the smaller ratio is**

(a) 2 : 3

(b) 3 : 2

(c) 3 : 1

(d) 5 : 15**Answer and Explanation : **Option **[d] “5:15” **is the Correct Answer**(iv) The ratio of the costs of two houses is 4 : 3. The proportional parts of 1st house is**

(a) 4/3

(b) 3/4

(c) 4/7

(d) 3/7**Answer and Explanation : **Option **[c] “4/7” **is the Correct Answer

**Q2. Write true / false :**

(i) The unit of ratio is none.

(ii) The fractional form of a : b is a/b .

(iii) The ratio of Rs 1 Rs 1.30 is 10 : 13**Answer and Explanation :**

(i) True

(ii) True

(iii) True

**Q3. Write the answers of the following question ****(i) A ratio in the simplest form is 5 : 7.If the antecedent is 45, find the consequent. ****Answer and Explanation :**

The Ration is 5:7

We know that

The antecedent is 5x

The Consequent :7x

According to question ,

Antecedent is 45

therefore , 5x = 45

x= 45/5

x= 9

The Consequent is 7x

7x = 7* 9 **63**

The answer of the above question is **63(ii) Write the ratio 2 (1/4) : 5/8 in the simplest form. **

**Answer and Explanation :**

2(1/4) : 5/8

9/4 : 5/8

Multiplying the numerator and denominator by two on the left hand side

(9*2) / (4*2) : 5/8

18/ 8 :5/8

Multiplying by 8 on both side

we get

**18:5**

Answer of the above question is

**18: 5**

(iii) Find the compound ratio of the following ratios :

2kg : 480 gm and

(iii) Find the compound ratio of the following ratios :

2kg : 480 gm and

**120 min : 150 min.****Answer and Explanation :**

2kg : 480 gm

Converting kg in gm

we get,

2000 gm : 480 gm

2000/480 = 25/6

**25 : 6**

120 min : 150 min

120/150

On Solving we get,

4/5

**4:5**

Now Calculating Compound Ratio :

(25 : 6) * (4: 5 )

(25 *4) / (6*5) = 10 / 3

**10 : 3**

Answer of the above question is

**10 : 3**

(iv) For cultivation of paddy 17 bags of cow dung and 3 bags of vegetable peel being mixed. Find the

proportional part of vegetable peel .

(iv) For cultivation of paddy 17 bags of cow dung and 3 bags of vegetable peel being mixed. Find the

proportional part of vegetable peel .

**Answer and Explanation :**

According to questions ,

Total number of bags of cow dung : 17 bags

Total Number of bags of vegetable peel : 3 bags

Total Number of bags : 17 + 3 = 20 bags

Proportion of Vegetable peel in the mixture is : (Number of vegetable peel bags/ Total number of bags mixed )

**3/ 20**

The answer of the above question is

**3/20.**

**Q4. Rs 12,100 is divided among Madhu, Manash, Kuntal and Indra in the ratio of 2 : 3 : 4 : 2. Calculate and write how which each will get.****Answer and Explanation :**

Total amount : Rs 12100

Given Ratio is 2:3:4:2

Now , 2+3+4+2 = 11

Madhu will get the amount = 12100 *(2/11) = 2200

Manash will get the amount = 12100 * (3/11) = 3300

Kuntal will get the amount = 12100 * (4/11) = 4400

Indra will get the amount = 12100 * (2/11) = 2200