Question

an open box at the top has its outer dimension 10 cm 9 cm and 2.5 cm and its thickness is 0.5 cm find the volume of the metal used

Answer 1

volume = lbh - lbh
= 11×10×3.5 - 10 ×9+×2.5
=160

Answer 2

Step-by-step explanation:

Given:

• Length = 10 cm.
• Breadth = 9 cm.
• Width = 2.5 cm.

To find:

Find the volume of metal ?

Solution:

We know that Volume of the outer metal= l * b * h

=> 10 * 9 * 2.5

=> 225 cm^3.

Given that thickness is 0.5 cm.

=> Length = 10 - (0.5 + 0.5)

                = 9 cm.

=> Breadth = 9 - (0.5 + 0.5)

                  = 8 cm.

=>  Width = 2.5 - (0.5)

               =  2 cm.

So, volume of the inner metal = l * b * h

=> 9 * 8 * 2

=> 144 cm^3.

Now,

Volume of the metal = 225 - 144 => 81cm^3.

Therefore, Volume of the metal = 81 cm^3.