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At what distance apart should two street lamps be placed so that the illuminance of the street surface at a point lying midway between the two poles is 6.4 lux ? the height of each lamp is 4m and the power of each lamp is 100c.p .

At what distance apart should two street lamps be placed so that the illuminance of the street surface at a point lying midway between the two poles is 6.4 lux ? the height of each lamp is 4m and the power of each lamp is 100c.p . 

Grade:9

1 Answers

Harsh
13 Points
3 years ago
It is very easy.
 

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