Question

a box is in the form of cuboid of dimensions (80*30*40) cm. the base the side faces and back faces are to be covered with a coloured paper. find the area of paper needed.

Answer 1

Answer:8000

Step-by-step explanation:

first area of the box = 2(80 * 30 + 30 * 40 + 80 * 40)

=2( 2400 + 1200 + 3200)

= 13600

therefore area of paper needed = 13600 - (area of front face + area of the top)

= 13600 - ( 80 * 40 + 80 * 30 )

= 13600 - 5600

= 8000

therefore answer is 8000

Answer 2

Given:

Dimensions of the box = 80×30×40

To Find:

The area of paper needed.

Explanation:

first area of the box = 2((80 ×30) + (30 × 40) + (80 × 40))

A=2( 2400 + 1200 + 3200)

A= 13600

= 13600 - ( area of the top + area of front face)

= 13600 - (( 80 ×40) + (80 × 30) )

= 13600 - 5600

= 8000

The area of paper needed is 8000.