Answer :
The total volume of diesel that the pair have altogether is equal to 20.8 L.
What is measurement?
Measurement is a process through which the size, magnitude, volume or other physical quantities that are associated with an object or chemical substance are taken, especially for the purpose of a scientific research (experiment).
In order to determine the total volume of diesel that they have, we would convert the value in centiliter (cL) to liter (L) and then add them together as follows:
840 cL to L = 840/100 = 8.4 L.
Total = 8.4 + 12.4
Total = 20.8 L.
Read more on liters here: https://brainly.com/question/277659
#SPJ1