An opaque cylindrical tank with an open top has a diameter of 3.00 m and is completely filled with water. When the setting sun reaches an angle of 37° above the horizon, sunlight ceases to illuminate any part of the bottom of the tank. How deep is tank in meter ? (A) (B) (C) (D)

Q. An opaque cylindrical tank with an open top has a diameter of $3.00 m$ and is completely filled with water. When the setting sun reaches an angle of $3 7^{\circ}$ above the horizon, sunlight ceases to illuminate any part of the bottom of the tank. How deep is tank in meter ?

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Answer: 4.00