From the top of a tower 100 m in height a ball is dropped and at the same time another ball is projected vertically upwards from the ground with a velocity of 25 m/s. Find when and where the two balls will meet? (g=9.8m/s)

From the top of a tower 100 m in height a ball is dropped and at the s

1.	From the top of a tower 100 m in height a ball is dropped and at the same time another ball is projected vertically upwards from the ground with a velocity of 25 m/s. Find when and where the two balls will meet? (g=9.8m/s)
Answer» Solution :For the BALL dropped from the TOP `x=4.9t^(2)""......(1)` For the ball thrown upwards `100-x=25t-4.9t^(2)""......(2)` From EQ. (1) and (2) `t=4s,x=78.4m`