A projectile moving vertically upwards with a velocity of 200 m/s breaks into two equal parts at the height of 490 m. One part starts moving vertically upwards with a velocity of 400 m/s. How much time after the break up will the other part hit the ground?

A projectile moving vertically upwards with a velocity of 200 m/s brea

1.	A projectile moving vertically upwards with a velocity of 200 m/s breaks into two equal parts at the height of 490 m. One part starts moving vertically upwards with a velocity of 400 m/s. How much time after the break up will the other part hit the ground?
Answer» `sqrt10s` `2sqrt10s` 5s 10s Answer :B