The equation of motion of a point in space is x = 2t, y =- 4t, z = 4t, where it measured in hour and the coordinates

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Q 2105478368.     The equation of motion of a point in space is x = 2t,
y =- 4t, z = 4t, where it measured in hour and the
coordinates of moving point in kilometers. The distance of
the point from the starting point O(0, 0, 0) in 10 hours is
A

20km

B

40km

C

60km

D

55km

#### HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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