Question

If a bacterium is 1 micrometer long and your index finger is 5.5 cm long, how many of the bacteria can you place end-to-end on your finger?

Answer 1

5.5 cm= 55,000 micrometer

Answer 2

Number of bacteria = 55000

Given:

The length of a bacterium = 1 micrometer

Length of the index finger = 5.5 centimeter

To find:

Number of bacteria can you place end-to-end on the finger?

Solution:

Given length of bacterium = 1 micrometer  

Length of the index finger = 5.5 centimeters

To find the number of bacterium convert length of the finger into micrometers

As we know 1 centimeter = 10,000 micrometers

⇒ 5.5 centimeter = 5.5 × 10,000 = 55000 micrometers  

No. of bacterium can be fitted in 55000 micrometers of finger

= Length of finger/ Length of bacteria

= 55000 micrometers/ 1 micrometer  = 55000

Therefore, Number of bacteria = 55000

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