Question

ML-T-2
7. A body projected up reaches a point p of its path at the end of 4 sec and the
highest point at the end of 12 sec. After how many seconds from the start will
it reach p again?
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Answer 1

Answer:

=>t=20. Since the ball reaches its' highest point after 12 seconds, then the total time in the air is 2 x 12, or 24 seconds; and the height it reaches after 4 seconds is the same as the height it is at 4 seconds before landing, or 2