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प्रश्न
The size of bacteria is 2 μ.. Find the number of bacteria in 3 m length.
उत्तर
1μ=10-6m
Length of one bacteria= 2 μ = 2 X 10-6m
Length given= 3m
Number of bacteria= length given/length of one bacteria
= 3/(2x10-6)
=1.5X106
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