Question

a strip of 4 cm wide is cut and removed from all the sides of the rectangular cardboard
with dimensions 30 x 20 cm. Find the area of the removed portion and area of the
remaining cardboard​

Answer 1

Answer:

area of removed portion = 184 sq cm

area of remaining cardboard = 416 sq cm

Step-by-step explanation:

1) original rectangular cardboard has dimensions 30×20 cm, so it's area is l×b = 30×20 = 600 sq cm.

2) when we remove a strip of 4 cm from all the sides we get a rectangle of dimensions 26×16 cm, so the area of this remaining cardboard is l×b = 26×16=416 sq cm.

3)area of removed portion = area of original rectangle - area of remaining rectangular cardboard

=600 - 416 = 184.

Answer 2

Answer:

Area of removed portion = 184 cm^2

Area of remaining cardboard = 416 cm^2