A body dropped from the top of a tower clears 7/16th of the total height of the tower in its last second of flight. The time taken by the body to reach the ground is :
According to Galileo's Ratio of Odd Number distances travelled is consecution interval of 1 sec is in the ratio of 1:3:5:7 so in 4th second distance travelled is 7/16th of total journey.
so, total time = 4 sec.