Question

sameen is in charge of decorating the school notice board. she is using coloured paper strips along the borders of the rectangular notice board which has a length of 64cm and the width of 48cm. what is the total length of coloured paper required?​

Answer 1

Answer:

Hey dear ,

A)

Let ABCD denotes the rectangle.

Length of the sheet = 30 cm

Breadth of the sheet = 20 cm

Area of the sheet = (30×20)=600cm2(30×20)=600cm2

A strip of width 4 cm is cut out all round from a sheet of paper

Let that form a rectangle PQRS

Let that form a rectangle PQRSLength of the rectangle PQRS = 30 - 4 - 4 = 22 cm

Let that form a rectangle PQRSLength of the rectangle PQRS = 30 - 4 - 4 = 22 cmBreadth of the rectangle = 20-4-4 = 12 cm

Let that form a rectangle PQRSLength of the rectangle PQRS = 30 - 4 - 4 = 22 cmBreadth of the rectangle = 20-4-4 = 12 cmArea of the rectangle PQRS =

22×12=264cm222×12=264cm2

Area of the strip cut out = Area of ABCD - Area of PQRS = 600cm2−264cm2=336cm2.

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