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Q.

An object is dropped from the top of a tower. It travels a distance 'x' in the first second of its motion and a distance '7x' in the last second. Height of the tower is(take g= 10 m/s2)

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a

60 m

b

70 m

c

80 m

d

90 m

answer is C.

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Detailed Solution

x=12g12and 7x=0+g22T−1T = 4sHeight of tower =12gT2=121042=80m

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An object is dropped from the top of a tower. It travels a distance 'x' in the first second of its motion and a distance '7x' in the last second. Height of the tower is(take g= 10 m/s2)