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A stone from the top of a tower, travels 35 m in the last second of its journey. The height of the tower is

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A stone from the top of a tower, travels 35 m in the last second of its journey. The height of the tower is
A. `20 m`
B. `40 m`
C. `60 m`
D. `80 m`
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Correct Answer - D
let t: time of journey
image
`35=0+1/2xx10(2t-1)impliest=4 s`
`h=(1)/(2).10.(4)^(2)=80 m`
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