A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of 40 m/s from the bottom of the building. The two balls will meet after

A ball is dropped from the top of a building 100 m high. At the same i

1.	A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of 40 m/s from the bottom of the building. The two balls will meet after
A.	3 s
B.	2 s
C.	2.5 s
D.	5 s
Answer» D. 5 s