Answer:

20m

Explanation:

Height of building=4m

Distance thrown to the ball=12m

The ball will go up=12m

Distance to reach the top(edge) of building=12m

Distance to reach the ground=4m

Total Distance covered to reach ground=12m+12m+4m

=28m

Verified answer

Answer:

-29.4m/s

Explanation:

s=ut+21at2

   =19.6×5−21×9.8×52

   =−24.5 m

Hence, height of tower =24.5m

v=u+at

   =19.6−9.8×5=−29.4 m/s

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