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Question 4 - Fractions - Adding, Subtracting, Comparing - Chapter 2 Class 7 Fractions and Decimals

Last updated at May 29, 2023 by

Ex 2.1, 4 - A rectangular sheet of paper is 12 1/2 cm long and 10 2/3

Ex 2.1, 4 - Chapter 2 Class 7 Fractions and Decimals - Part 2
Ex 2.1, 4 - Chapter 2 Class 7 Fractions and Decimals - Part 3 Ex 2.1, 4 - Chapter 2 Class 7 Fractions and Decimals - Part 4

 

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Transcript

Question 4 A rectangular sheet of paper is 12 1/2 cm long and 10 2/3 cm wide . Find its perimeter.Length of rectangle = 12 1/2 cm Breadth of rectangle = 10 2/3 cm Perimeter = 2 (Length + Breadth) = 2 [("12 " 1/2)+ (10 2/3)] = 2 [("12 +" 1/2)+ (10+2/3)] = 2 [(12+10)+ (1/2+2/3)] = 2 [22+((1 3 + 2 2)/(2 3))] = 2 [22+((3 + 4)/6)] = 2 [22+7/6] = 2 22 + 2 7/6 = 44 + 7/3 = (44 3 + 7)/3 = (132 + 7)/2 = 139/3 cm Since Numerator > denominator Converting to mixed fraction = 46 1/3 cm Total weight = 139/3 cm = 46 / cm

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.