Transcription of Perimeter and Chapter 11 - NCERT
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Perimeter and Chapter 11 - NCERT
Perimeter AND INTRODUCTIONIn Class VI, you have already learnt perimeters of plane figures and areas of squares andrectangles. Perimeter is the distance around a closed figure while area is the part of plane orregion occupied by the closed this class, you will learn about perimeters and areas of a few more plane SQUARES AND RECTANGLESA yush and Deeksha made pictures. Ayush made his picture on a rectangular sheet of length60 cm and breadth 20 cm while Deeksha made hers on a rectangular sheet of length 40 cmand breadth 35 cm. Both these pictures have to be separately framed and has to pay more for framing, if the cost of framing is ` per cm?If the cost of lamination is ` per cm2, who has to pay more for lamination?For finding the cost of framing, we need to find Perimeter and then multiply it by the ratefor framing.
at the rate of ` 150 per metre. SOLUTION The length of the fence required is the perimeter of the garden (excluding one side ) which is equal to 20 m + 12 m + 12 m, i.e., 44 m. Cost of fencing = ` 150 × 44 = ` 6,600. EXAMPLE 4 A wire is in the shape of a square of side 10 cm. If the wire is rebent into a rectangle of length 12 cm, find its ...
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