# A red blood cell has a diameter of approximately 0.00075 centimeter. Suppose one of the arteries in your body has a diameter of 0.0456 centimeter. How many red blood cells could fit across the artery?

Aug 20, 2017

About $60$ red blood cells will fit across the artery.

#### Explanation:

The small measurements in this question are what make it seem confusing at first. The word 'approximately' means it is not an accurate measurement.

Think about a similar question with easier values.
A tin has a diameter of $16$ cm.
How many candles with a diameter of $2$ cm can fit across it?

This is clearly a division $\text{ } \rightarrow 16 \div 2 = 8$ candles.

In the question given, it is also a division.

"How many times will $0.00075$ fit into 0.0456?"

$0.0456 \div 0.00075 = \frac{0.0456 c m}{0.00075 c m}$

$= \frac{0.0456}{0.00075} \times \frac{100000}{100000} = \frac{4560}{75}$

$= 60.8$

About $60$ red blood cells will fit across the artery.