It would take both Carl and Joseph 0.1 hours to complete the work.
An equation is an expression that shows the relationship between two or more numbers and variables.
Let t represent the amount of time in hours it would take them to finish the work.
For Carl, time = 15 minutes = 0.25 hr
For Joseph, time = 10 minutes = 0.167 hr
Hence:
[(1/0.25) + (1/0.167)]t = 1
t = 0.1 hr
It would take both Carl and Joseph 0.1 hours to complete the work.
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