Question

What will be the volume of a cube having length of edge 7.5​

Answer 1

Answer:

421.875

Step-by-step explanation:

formulae of volume of cube = a³

where a=length of side

a³ = (7.5)³                                            (you can use this method to make your                                      

                                                                calculation easy)

=(7+0.5)³

=7³+0.5³+3×7×7×0.5 + 3×7×0.5×0.5

=343 + 0.125 + 21×3.5 + 21×0.25

=343.125 + 73.500 + 5.250

=416.625 + 5.250

=421.875