2.Two men start moving from two different towns 20km apart and walk towards each other. They meet in 120min. One man walked at 6km/h. How fast does the other man walk? SHOW WORKING

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c