Question

A sheet of paper measures 30 cm and 20 cm. If a strip of 4 cm wide is cut from it all around then the area of the remaining sheet is

Answer 1

Area of the sheet = 20×30
=600 sq cm
Area of remaining sheet
= (20-2 (4))×(30-2(4))
=12×22
=264 sq cm

Answer 2

The area of an object is the amount of surface that the object occupies.

Area formula  = 
= length width
= l × w

Area of the sheet =  l × w = 20×30

=600 cm²

Area of remaining sheet

= (20-2 (4))×(30-2(4))

=12×22

=264 cm²