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If an object is dropped from the top of ...

If an object is dropped from the top of a building and it reaches the ground at t = 4s, then the height of the building is (ignoring air resistance)`(g=9.8ms^(-2))`

A

77.3 m

B

78.4 m

C

80.5 m

D

79.2 m

Text Solution

Verified by Experts

The correct Answer is:
B
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