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The ceiling of a tunnel is 5 m high. Wha...

The ceiling of a tunnel is 5 m high. What is the maximum horizontal distance that a ball thrown with a speed of 20 m/s, can go without hitting the ceiling of the tunnel? ( `g=10 m/s^2`)

A

`10sqrt3` m

B

`20sqrt3` m

C

`30sqrt3`m

D

40m

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