A jet projected at an angle of 45θ, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is« Back to Previous Page
A. 15 m
B. 20 m
C. 30 m
D. 40 m
E. 60 m.
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D. 40 m |
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D. 40 m |
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D. 40 m |
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