A room 12 m × 12 m is lit by 10 lamps to a fairly uniform illuminatio – McqOptions

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1.	A room 12 m × 12 m is lit by 10 lamps to a fairly uniform illumination of 100 lm/m2. Calculate the utilization coefficient of the room given that the output of each lamp is 1600 lumens.
A.	0.5
B.	0.3
C.	0.9
D.	0.4
Answer» D. 0.4

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