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A stone is thrown with an initial speed ...

A stone is thrown with an initial speed of ' 4.9 ms^(-1)' from a bridge in vertical upward direction. If falls down in water after `2` seconds. The height of the bridge is.

A

`4.9m`

B

`9.8m`

C

`19.8m`

D

`24.7m`

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The correct Answer is:
B
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