A 200 CP lamp is hung 4 metres above the centre of a circular area of – McqOptions

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1.	A 200 CP lamp is hung 4 metres above the centre of a circular area of diameter 5 m. The illumination at the centre of the area will be:
A.	12.73 lux
B.	9.73 lux
C.	12.5 lux
D.	15.92 lux
Answer» C. 12.5 lux

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