A room of dimensions 10 m × 12 m is to be lighted by 20 lamps of unif – McqOptions

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1.	A room of dimensions 10 m × 12 m is to be lighted by 20 lamps of uniform illumination of around 100 lm/m2. If the output of each lamp is around 1000 lumens, what will be the utilization factor of the room?
A.	0.4
B.	0.6
C.	0.45
D.	0.5
Answer» C. 0.45

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