Question

Find the weight of a cube of m.s. of 14cm side with its density being 7.8 gm/cc

Answer 1

Given:
Side of cube( a) = 14 cm
Density of cube (D) = 7.8 gms / cc
Volume of cube = (side)³
Volume of cube(V) = 14³ = 14 × 14 ×14= 2744 cm³
Density(D) = Mass(M) / volume(V)
D = M/V
Mass(M) = Density(D) × Volume(V)
M = 7.8 × 2744
M = 21403.2 gm
Hence , the weight of cube is 21403.2 gm

HOPE THIS WILL HELP YOU....

Answer 2

According to question

Side of cube   x = 14 Cm

Thus volume of Cube = x^3 = 14^3
                                            = 2744 Cm^3

Given that    Density = 7.8 gm/cc
So

Density  = Mass/ Volume
Thus    Mass = Density * Volume
                      = 7.8 * 2744
                      = 21403.2 Gm