# A stone is thrown at a spedd of 19.6 m/s along horizontal direction from a tower of hieght 490 m. The distance from the foot of the tower to the point where stone hits the ground is  Option 1) 98 m Option 2) 196 m Option 3) 392 m Option 4) 200 m

A Avinash

As we have learnt,

Projectile Projected Horizontally -

$R= u .\sqrt{\frac{2h}{g}}$

- wherein

$R=$ Range of projectile

$u=$ horizontal velocity of projection from height h

Time taken to reach ground = $\sqrt{\frac{2h}{g}} = \sqrt{\frac{2\times490}{9.8}} = 10 sec$

Horizontal distance = 4xt = 19.6 x 10 m = 196 m

Option 1)

98 m

Option 2)

196 m

Option 3)

392 m

Option 4)

200 m

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