Задача 40936.

In the center of a round table with a diameter D = 2 m set a table lamp with a light bulb at a height h1 = 40 cm from the surface of the table. Above the center of the table at a height h2 = 2,3 m from the surface of the chandelier hung with the same three light bulbs. In which case, get more coverage edge of the table when the lamp is turned on or when the board is on the chandelier?

Detailed solution with a short recording conditions, laws and formulas used in the decision, the withdrawal of the calculation formula and the answer.
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