Question

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

Answer 1

Answer:

184

Explanation:

Answer 2

Given that,

The dimension of rectangular cardboard is 30cm × 20cm

To find,

When a strip 4 cm wide is cut and removed from all the sides of the rectangular cardboard, find the area of the removed portion and area of the remaining cardboard​.

Solution,

The original area of the cardboard is :

A = lb

$A=30\times 20=600\ cm^2$

When a strip of 4 cm is cut and removed, new dimensions are 26 cm and 16 cm. The area of remaining cardboard is :

$A'=26\times 16=416\ cm^2$

Area of the removed portion is = A - A'

$=600-416\\\\=184\ cm^2$

Hence, this is the required solution.