Saturday, January 2, 2016

Find the volume of the cube if endpoints of one of the sides are ( 1,3,-1) and ( 4,-3,5)

Given the endpoints of one of the sides of a cube are (
1,3,-1) and (4,-3,5)


Let us calculate the length of the
side using the distance formula.


==> D = sqrt(
x1-x2)^2 + 9y1-y2)^2 + (z1-z2)^2]


==> D = sqrt[ (
1-4)^2 + (3+3)^2 + (-1-5)^2]


==> D = sqrt( 3^2 + 6^2
+ -6^2 )


==> D = sqrt( 9+ 36+36) = sqrt81 =
9


Then the length of the side of the cube is 9
units.


Now we will calculate the
volume.



We know that the volume is given by
:


V = side^3 = 9^3 =
729



Then the volume of the cube is
V = 729 cubic units.

No comments:

Post a Comment

Can (sec x - cosec x) / (tan x - cot x) be simplified further?

Given the expression ( sec x - csec x ) / (tan x - cot x) We need to simplify. We will use trigonometric identities ...