A lamp is hanging at a height of above a table. The lamp is lowered by . The percentage increase in illuminance will be |
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a) |
40% |
b) |
64% |
c) |
78% |
d) |
92% |

A lamp is hanging at a height of above a table. The lamp is lowered by . The percentage increase in illuminance will be |
|||||||

a) |
40% |
b) |
64% |
c) |
78% |
d) |
92% |

1 Answer

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