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Question

# A stone dropped from the top of a tower travels 59th of the height of tower during the last second of fall. Height of the tower is: (take g = 10 m/s2)

A
52 m
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B
36 m
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C
45 m
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D
78 m
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Solution

## The correct option is B 36 mAs g is given to be 10 m/s2 the stones speed will increase by 10 m/s for every second of fall, therefore, the distance traveled at any given time will be an integral multiple of 10, let's look at the options, a) 52 m (52×5)9 = 28.88 m b) 36 m (36×5)9 = 20 m c) 45 m (45×5)9 = 25 m d) 78 m (78×5)9 = 43.33 m

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