# Bulbs

There are 875 identical light bulbs in the sports hall lightning for 2 hours. How long does it lightning 100 this light bulbs?

Result

t =  17.5 h

#### Solution:

$t = \dfrac{ 875 \cdot \ 2 }{ 100 } = \dfrac{ 35 }{ 2 } = 17.5 = 17.5 \ \text{ h }$

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