Question

Edge of a metal cube is 3 cm. Find the total
surface area of the cube,
(1) A rectangular box is filled with 30 such cubes,
Calculate the internal volume of the box,
If the weight of the box is 1.5 kg and the total
weight of the box with the thirty cubes is
2.4 kg, calculate the weight of each cube
giving your answer in grams​

Answer 1

Answer:

Step-by-step explanation:

Edge of cube = a = 3cm.

Surface area of cube is 6a^2

= 6*3^2 = 6*9 = 54cm^2....

Now internal volume of box is volume of 30 such cubes...

Volume of cube = a^3

So, volume of box = 30 * 3^3

=30 * 27 = 810cm^3

Now, wt of 30 cubes = (wt of box with cubes - without cubes)

So, wt of 30 cubes = 0.9 kg or 900g

Thus, wt of each cube is 900/30

Or 30g....

Answer 2

Answer:

Hope this answer helps you