41. A body is thrown vertically upward from the ground. It reaches a maximum height of 20 m in 5 sec. After what time, it will reach the ground from its maximum height position?
(a) 2.5sec
(b) 5sec
(c) 10sec
(d) 25sec
Answer : (b) 5sec
In vertical motion under constant gravity (neglecting air resistance), the motion is symmetric about the highest point,
so the time to go up equals the time to come down for the same vertical distance.
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