The maximum speed of a boat in still water is 27 km/h. Now this boat is moving downstream in a river flowing at 9 km/h. A man in the boat throws a ball vertically upwards with a speed of 10 m/s. Range of the ball as observed by an observer at rest on the river bank, is ______ cm.
(Take g=10 m/s2 )
[Jan. 29, 2025 (I)]