{"id":26378,"date":"2021-06-25T17:38:51","date_gmt":"2021-06-25T12:08:51","guid":{"rendered":"https:\/\/mcq-questions.com\/?p=26378"},"modified":"2022-03-02T10:47:33","modified_gmt":"2022-03-02T05:17:33","slug":"ncert-solutions-for-class-7-maths-chapter-2-ex-2-1","status":"publish","type":"post","link":"https:\/\/mcq-questions.com\/ncert-solutions-for-class-7-maths-chapter-2-ex-2-1\/","title":{"rendered":"NCERT Solutions for Class 7 Maths Chapter 2 Fractions and Decimals Ex 2.1"},"content":{"rendered":"
(Along the first row \\(\\frac{4}{11}+\\frac{9}{11}+\\frac{2}{11}=\\frac{15}{11}\\)) \nAnswer: \nSum of numbers along the \n1st<\/sup>row = \\(\\frac{4}{11}+\\frac{9}{11}+\\frac{2}{11}\\) = \\(\\frac{4+9+2}{11}\\) \n\\(\\frac{15}{11}\\) \n \nSince, the sum of numbers in each case is the same therefore, it is a magic square.<\/p>\n
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Question 4. \nA rectangular sheet of paper is 12\\(\\frac{1}{2}\\) cm long and 10\\(\\frac{2}{3}\\) cm wide. Find its perimeter. \nAnswer: \nLength of a rectangle = 12\\(\\frac{1}{2}\\) cm = \\(\\frac{25}{2}\\) cm \nWidth of a rectangle = 10\\(\\frac{2}{3}\\)cm = \\(\\frac{32}{3}\\) cm \nPerimeter of a rectangle = 2 (length + breadth) \n<\/p>\n
Question 5. \nFind the perimeters of (i) \u0394ABE (ii) the rectangle BCDE in this figure. Whose perimeter is greater? \n \nAnswer: \n(i) Perimeter of \u0394ABE = AB + BE + AE \n<\/p>\n
(ii) Perimeter of rectangle BCDE \n= 2 [length + breadth] \n= 2 [CD + DE] \n \n \nThus, the perimeter of \u0394ABE is greater.<\/p>\n
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Question 6. \nSalil wants to put a picture in a frame. The picture is 7\\(\\frac { 3 }{ 5 }\\) cm wide. To fit in the frame the picture cannot be more than 7\\(\\frac { 3 }{ 10 }\\) cm wide. How much should the picture be trimmed? \nAnswer: \nWidth of the picture = 7\\(\\frac { 3 }{ 5 }\\)cm \n\\(\\frac { 38 }{ 5 }\\)cm \nRequired width of the picture \n= 7\\(\\frac { 3 }{ 10 }\\) cm = \\(\\frac { 73 }{ 10 }\\) cm \nThe picture should be trimmed by \n \nThe picture should be trimmed by \\(\\frac { 3 }{ 10 }\\) cm.<\/p>\n
Question 7. \nRitu ate \\(\\frac { 3 }{ 5 }\\) part of an apple and the remaining apple was eaten by her brother Somu. How much part of the apple did Somu eat? Who had the larger share? By how much? \nAnswer: \nRitu ate \\(\\frac { 3 }{ 5 }\\) part of an apple, therefore part of the apple ate by Somu = 1 – \\(\\frac { 3 }{ 5 }\\) \n= \\(\\frac{5-3}{5}=\\frac{2}{5}\\) \n\\(\\frac{3}{5}>\\frac{2}{5}\\) \n\u2234 Ritu had the larger share by = \\(\\frac{3}{5}-\\frac{2}{5}\\) \n= \\(\\frac{3-2}{5}=\\frac{1}{5}\\) \nThus, Ritu had the larger share by \\(\\frac{1}{5}\\) part of an apple.<\/p>\n
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Question 8. \nMichael finished colouring a picture in \\(\\frac{7}{12}\\) hour. Vaibhav finished colouring the \nsame picture in \\(\\frac{3}{4}\\) hour. Who worked longer? By what fraction was it longer? \nAnswer: \nTime taken by Michael = \\(\\frac{7}{12}\\) hour \nTime taken by Vaibhav = \\(\\frac{3}{4}\\) hour. \n \nThus, Vaibhav worked longer by \\(\\frac{1}{6}\\) hour.<\/p>\n","protected":false},"excerpt":{"rendered":"
These NCERT Solutions for Class 7 Maths Chapter 2 Fractions and Decimals Ex 2.1 Questions and Answers are prepared by our highly skilled subject experts. NCERT Solutions for Class 7 Maths Chapter 2 Fractions and Decimals Exercise 2.1 Question 1. Answer: Question 2. (i) (ii) Answer: (i) L.C.M of 9, 3 and 21 = 63 …<\/p>\n