RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions for Class 7 Mathematics

Created by: Abhishek Kapoor

Class 7 : RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

The document RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev is a part of the Class 7 Course RD Sharma Solutions for Class 7 Mathematics.
All you need of Class 7 at this link: Class 7

QUESTION 10:

What should be added to RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev


ANSWER 10:

Let x be the required fraction.
According to the question:

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev


QUESTION 11:

Suman studies for RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev hours daily. She devotes RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev hours of her time for Science and Mathematics. How much time does she devote for other subjects?


ANSWER 11:

Suman studies for  RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev hours daily. Therefore, we have 

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

She studies science and mathematics for  RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev hours. Therefore, we have 

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

Time devoted to other subjects = Total study time - Time devoted to science and mathematics  

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev


QUESTION 12:

A piece of wire is of length RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev If it is cut into two pieces in such a way that the length of one piece is  RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev what is the length of the other piece? 


ANSWER 12:

Let the length of second piece be x.
Total length of wire = Length of one piece + Length of second piece

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev


QUESTION 13:

A rectangular sheet of paper is  RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev wide. Find its perimeter. 

ANSWER 13:

Perimeter of rectangle = 2(length + width)

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev


QUESTION 14:

In a "magic square", the sum of the numbers in each row, in each column and along the diagonal is the same. Is this a magic  square?

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

ANSWER 14:

Sum along columns and rows:

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

Since, all the sums in the square   are equal along rows,columns and diagonals,it is a magic square. 


QUESTION 15:

The cost of Mathematics book is Rs RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev and that of Science book is Rs  RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev Which costs more and by how much? 

ANSWER 15:

Cost of mathematics book =RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

Cost of Science book RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

Thus, Mathematics book costs more.Difference in the cost of Mathematics and Science book =cost of Mathematics bookCost of Science book 

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

So, Mathematics book costs more by Rs RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

QUESTION 16:

(i) Provide the number in box RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev and also give its simplest from in each of the following: 

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

ANSWER 16:

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

RD Sharma Solutions (Part - 2) - Ex-2.1, Fractions, Class 7, Math Class 7 Notes | EduRev

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