Two pedestrians simultaneously left two villages 36 km apart and walked toward each other, meeting after 4 hours. The first pedestrian walked at a speed of 3 km per hour. At what speed (in km per h) did the second pedestrian walk?

10 - 8 = -2

  8 - 6 = -2

etc, so -2 is the common difference

step-by-step explanation:

for this case we have that by definition, the volume of a cylinder is given by:

where:

r: it's the radio

h: it's the height

we have as data that:

substituting:

so, the cylinder volume is

option d