Answer
(b) 93 cm.
Work Step by Step
A seed is launched at 0 degrees and travels horizontally.
The vertical height $h = 20cm$.
The time taken to fall is $\frac{1}{2}gt^2 = 0.2 \implies t = 0.202 s$.
The horizontal height $x = vt = (4.6)(0.202) = 0.93 m = 93 cm$, which is choice (b).
