A wooden block is dropped from a height of 100 m high simultaneously a bullet is fired from the foot of the cliff upward with a velocity of 100m/s .after what time the bullet and the wooden block meet

A wooden block is dropped from a height of 100 m high simultaneously a bullet is fired from the foot of the cliff upward with a velocity of 100m/s .after what time the bullet and the wooden block meet

Write out the equations of motion for the two objects and set them equal, then solve for t. Try it - show us your attempt and we'll help you if you get stuck.