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Q.

A body is projected with a horizontal velocity of 72 km/hr in the north east direction from the top of a tower of height 80 m. If g=10ms−2 its horizontal range is

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a

80 m

b

40 m

c

100 m

d

60 m

answer is C.

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Detailed Solution

Given situation is horizontal projection from the top of a tower

R=u2hg

R=72×5182(80)10

R=20(4)=80m

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