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Ex 11.1, 4 - The perimeter of a rectangular sheet is 100 cm. If length

Ex 11.1, 4 - Chapter 11 Class 7 Perimeter and Area - Part 2

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Ex 11.1, 4 The perimeter of a rectangular sheet is 100 cm. If the length is 35 cm, find its breadth. Also find the area. Length of rectangular sheet = l = 35 cm Breadth of rectangular sheet = b = ? Given, Perimeter of rectangular sheet = 100 cm 2 (l + b) = 100 2(35 + b) = 100 35 + b = 100/2 b = 50 − 35 b = 15 cm ∴ Breadth of rectangular sheet = b = 15 cm Now, Area of sheet = l × b = 35 × 15 = 525 sq. cm. = 525 cm2 Sheet is of area 525 cm2

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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.