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The equation of motion of rockets are x=...

The equation of motion of rockets are `x=2t, y=-4t, z=4t` where the time 't' is given in second and the coordinate of a moving point in kilometres. What is the path of the rockets? At what distance will the rocket be from the starting point `O(0, 0, 0)` in 10s.

A

Straight line , 60 km

B

Straight line , 30 km

C

Parabola , 60 km

D

Ellipse , 60 km

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The correct Answer is:
A
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