Question

4) A person goes somewhere with speed 20kmile and, wreturns back with speed 30km/h. What is the average speed with whide he is moving ​

Answer 1

Answer:

Simple squamous epithelium

This type of epithelia lines the inner surface of all blood vessels (endothelium), forms the wall of alveolar sacs in the lung and lines the body cavities (mesothelium). The primary function of simple squamous epithelia is to facilitate diffusion of gases and small molecules.

Explanation:

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Answer 2

Answer:

Let distance from A to B be x

Time for travel from A to B= x/20

Time for travel from B to A= x/30

Hence,speed for total distance 2x is:

30

x

+

20

x

2x

=

5x

2x×60

=24 km\hr

Explanation:

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