I believe the answer is liquid.
Answer:
The mass of the cube is 420.8 kg.
Explanation:
Given that,
Length of edge = 38.9 cm
Density 
We need to calculate the volume of cube
Using formula of volume


We need to calculate the mass of the cube
Using formula of density




Hence, The mass of the cube is 420.8 kg.
Answer:
|X| = 72 cm
Explanation:
We need to find the magnitude of vector X.
Vector Y = 21 cm
Vector Z = 75 cm
We know that, the magnitude of resultant vector is given by :

So, the value of magnitude of vector X is 72 cm
D it is D the answer is D