Question

A strip of width 3cm is cut out all around from a sheet of paper with dimensions 30cm by 20cm. What will be the length and breadth of the remaining sheet?

Answer 1

Answer:

Let ABCD denotes the rectangle.

Length of the sheet = 30 cm

Breadth of the sheet = 20 cm

Area of the sheet = (30×20)=600cm²

A strip of width 3 cm is cut out all round from a sheet of paper

Let that form a rectangle PQRS

Length of the rectangle PQRS = 30-3-3 = 24 cm

Breadth of the rectangle = 20-3-3 = 14 cm

Area of the rectangle PQRS = 24×14=336cm²

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

Answer 2

Step-by-step explanation:

if the width of 3cm is cut arounf tge sheet...

breadth and length gets reduced by 2 times the width which is cut..

so,

breadth = 20 - 2(3)

=20-6 = 14cm

length = 30 - 2(3)

= 30-6 = 24 cm

so the new dimension of the sheet is 24cm by 14 cm