Find the mean proportional of the following pairs of numbers 6 and 24.  Choose the correct choice from the following.
A) 27
B) 28
C) 29
D) 23
E) 12
Required number of trees   = 24/36 * 42= 
<gadget id="calculator">24/36 * 42</gadget>
<output>28</output>
28.   Answer:28
<result>B</result>
Find the mean proportional of the following pairs of numbers 6 and 24.