Question

Egee 102 you are redecorating your living room. and the interior designer recommends 50 footcandles illumination. your living room measures 6 ft by 12 ft. how many 40 watt bulbs will be required if one bulb emits 515 lumens. (1 footcandle = 1 lumen/sq.ft)

Answer 1

The area of the room is given by:
A = (6) * (12)
A = 72 feet ^ 2
For each 40 watt bulb we have:
(515) / 72 = 7.152777778 footcandle
The number of 40 watt bulbs is:
N = (50) / (7.152777778)
N = 7, 40 watt bulbs
Answer:
will be required about:
N = 7, 40 watt bulbs