A wooden block is dropped from the top of a cliff 100 m high. Simultaneously a bullet of mass 10 g is fired from the foot of the cliff upwards with a velocity of 100 m/s. The bullet and wooden block will meet each other after a time

Question

$$(a)\;10\;s \qquad (b)\;0.5\;s\qquad (c)\;1s\qquad (d)\; 7\;s$$