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7th Grade > Mathematics

FRACTIONS AND DECIMALS MCQs

Fractions, Decimals


Total Questions : 227 | Page 21 of 23 pages
Question 201.


(a) It is said that the weight of a body on the moon is 16th of its weight on earth. Calculate the weight of a car on the moon if it weighs 420 kg on Earth. 
[4 MARKS]
(b) What is the fraction of coloured squares to the total number of squares?  State your answer in decimals also.

(a) It Is Said That The Weight Of A Body On The Moon Is 16th...


 Discuss Question
Answer: Option A. ->
:
Each part: 2 Marks
(a)
(a) It Is Said That The Weight Of A Body On The Moon Is 16th...
Now, the weight of the car in Moon = 16 of its weight on earth.
16 of 420 kg
4206
70 kg
weight of the car in Moon = 70 kg only.
(b) There are 100 squares. 46 out of them are coloured. This picture shows forty-six hundredths.


To write 46 hundredths as a decimal, we use a place value chart.


(a) It Is Said That The Weight Of A Body On The Moon Is 16th...


The answer is 0.46.


Question 202.


Car A covers 5.5 km in 4 litres of petrol and another car B covers 1800 metres in 1 litre of petrol. Calculate the mileage per litre of petrol and now calculate which car travels more and by how much distance compared to the other? [4 MARKS]


 Discuss Question
Answer: Option A. ->
:

Conversion Formula: 1 Mark
Steps: 2 Marks
Answer: 1 Mark
Given that
Distance covered by car A in 4 liters of petrol is 5.5 km.
Now 1 km=1000 m.
5.5 km=5500 m


Distance covered by car A in 1 litre of petrol = (5500/4) = 1375 metres


Distance covered by car B in 1 liter of petrol = 1800 meters


So car B travels more compared to car A


Difference = 1800-1375 = 425 metres 
Car B travels  425 meters more than car A


Question 203.


Karan solves a question in 15 seconds. One of his friends challenges him that he can complete the work in one-fourth of the time that Karan takes. What is the time taken by Karan's friend to complete the work? [1 MARK]


 Discuss Question
Answer: Option A. ->
:

Time taken by Karan to solve a question= 15 seconds
As per the question,


Time taken by Karan's friend to solve the question
= (1/4) of the time taken by Karan to solve the question
 =(15)(1/4) = 3.75 seconds
Hence, Karan's friend will take 3.75 seconds to solve the question.


Question 204.


The area of a rectangle is 50 m2. Find the breadth of the rectangle given that its length is 47m.  [2 MARKS]


 Discuss Question
Answer: Option A. ->
:

Formula: 1 Mark
Result: 1 Mark
 We know that area of the rectangle = 
50m2


 Given that the length of the rectangle
= 47
metres


Now, Length × breadth= Area of the rectangle
Let the breadth be 'b' meters


47×b = 50


b = 1752 metres
Hence, the breadth of the rectangle is 1752 metres.


Question 205.


A bag contains 35 apples and 28 bananas. They are distributed to 7 students such that all have an equal number of apples and bananas. How many fruits does each student get?  [2 MARKS]


 Discuss Question
Answer: Option A. ->
:

Concept: 1 Mark
Application: 1 Mark
Given that
Total number of apples = 35


The number of apples each student gets = (35/7) = 5 apples


Total number of bananas = 28              


The number of bananas each student gets =(28/7) = 4 bananas                                                                           


Total number of fruits a student gets = 5 apples + 4 bananas = 9
Hence, each student will get 5 apples and 4 bananas. 


Question 206.


Ramesh does 110th of work in an hour while his friend does 110000th of what Ramesh does in the given time. What part of work did Ramesh's friend complete in an hour ? [2 MARKS]


 Discuss Question
Answer: Option A. ->
:

Steps: 1 Mark
Answer: 1 Mark
Let the total work be  W


The work completed by Ramesh = 110×W


The work completed by Ramesh's friend = 110×110000W


= 1100000×W
Ramesh's friend completes 1100000th  of the work in the given time,


Question 207.


Damayanti ate 29 th part of a pizza. The remaining was divided equally between Hari and Shankar. What part of pizza did Hari and Shankar get?  [2 MARKS]


 Discuss Question
Answer: Option A. ->
:
Steps: [1 Mark]
Answer: [1 Mark]
Amount of pizza eaten by Damayanti =29
Amount of pizza not eaten by Damayanti
9929=79
Damayanti Ate 29 Th Part Of A pizza. The Remaining Was Divi...
This portion is to be divided equally amongst Hari and Shankar.
Damayanti Ate 29 Th Part Of A pizza. The Remaining Was Divi...
Hari and Shankar will get 79÷21
79×12
718 of the pizza each
So Hari and Shankar each get 718 of the pizza
Question 208.


A man completes a work in 1 hour in his first attempt and in his second attempt he completes it in (1/4) of 1 hour. In his third attempt, he completes it in (4/5)th time of what he took in his second attempt. How long did he take to complete the work in his third attempt? What is the difference in the time taken by him in the first and third attempt?  [3 MARKS]


 Discuss Question
Answer: Option A. ->
:

Steps: [1 Marks]
Each answer: [1 Mark]
Time taken by the man in his first attempt = 1 hour


 Time taken by the man in his second attempt = 14×1


  =  14 hour


  Time taken by the man in his third attempt = 14×45


  = 15
Hence he took  
15 hours to complete the work on his third attempt.
The difference in the time taken by him in his first attempt and third attempt
=115=45 hours


Question 209.


In a match of 50 overs, the team batting second was given a target of 310.They lost the match by 10 runs. The team batting second, i.e. the team which lost, scored one-half of their runs in 30 overs and in next five overs they scored one-half of the remaining runs. Later in the next 8 overs, they scored  15th of the remaining runs. In last seven overs, they scored the remaining runs. How many runs did they score in the last seven overs?  
[3 MARKS]


 Discuss Question
Answer: Option A. ->
:

Steps: [2 Marks]
Result: [1 Mark]
Total runs scored by the team that lost = 310 - 10 = 300
Now, total no. of overs played by them = 50
i.e. in 30 overs, this team scored =3002
=150 runs
The balance 300 - 150 = 150 runs were scored by this team in balance 20 overs.
By the given condition
In the next 5 overs 12 of 150 runs
= 75 runs were scored.
150 runs - 75 runs = 75 runs are still in balance.
Again in the next 8 overs.
15 of 75 = 15 runs were scored.
Now No. of overs left = 20 - (5 + 8)
=20 - 13
=7 overs
In seven overs, runs scored will be 75 - 15 = 60 runs


Question 210.


A circle is divided into four equal parts. One of the parts is again divided into two equal parts. If the area of the given circle is 400 metre square. What is the area of the shaded region? [3 MARKS]


 Discuss Question
Answer: Option A. ->
:

Visualizing the question : 1 Mark
Steps : 1 Mark
Result : 1 Mark
A Circle Is Divided Into Four Equal Parts. One Of The Parts ...
Area of the given circle = 400 m2


Area of each sector= 4004=100m2


Area of the shaded portion = 1002 
= 50m2


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