A projectile passes two points A and B at same height after 2 s and 6 s of its projection. Horizontal separation between the points A and B is 120 m. The horizontal range is closest to:[g=10m/s2]
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a
180 m
b
200 m
c
240 m
d
260 m
answer is C.
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Detailed Solution
Time of flight Tf = 2+ 6 = 8 sFor horizontal motion A to B :Δt=4sSo, ux=120m4s=30m/sRange = 30 x 8 = 240m