Question

plz gimme the ans

I'll mark the one as brainliest.
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Answer 1

Answer:

4√10 sec

Explanation:

relative distance = 4m

realtive initial speed = 0

realtive acceleration = (2+0.2-(2-0.3)) = 0.5

$s \: = ut + \frac{1}{2} a {t}^{2}$

40 = 0(t) + 1/2 (0.5)t^2

40×4 = t^2

t = 4√10 sec

they collide after 4√10 secs