Angle of elevation (or depression) from two points on the same side of a tower: find the height, distance or time

1. A.
   $100\sqrt{3}$ m
2. B.
   $\frac{200\sqrt{3}}{3}$ m
3. C.
   $\frac{100\sqrt{3}}{3}$ m
4. D.
   $200\sqrt{3}$ m

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1. A.
   $x = y$
2. B.
   $2x = 3y$
3. C.
   $2x = \sqrt{3}\,y$
4. D.
   $2y = \sqrt{3}\,x$

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1. A.
   $7.7 < t < 8$
2. B.
   $8 < t < 8.3$
3. C.
   $8.3 < t < 8.6$
4. D.
   $8.6 < t < 8.9$

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1. A.
   225 m
2. B.
   270 m
3. C.
   300 m
4. D.
   330 m

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1. A.
   $3\sqrt{3}$ km
2. B.
   $2\sqrt{3}$ km
3. C.
   $\sqrt{3}$ km
4. D.
   $\frac{\sqrt{3}}{2}$ km

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