Vincent has already finished 5 oil changes today, and can complete more at a rate of 1 oil change per hour. Warren just came on
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So. the smaller hose, can fill the pool in 8hrs
in 1hr then, it really has done only 1/8 of the job
if we take the filled pool to be the total job time, or "t"
then the smaller hose in 1hr has only done only 1/8 in "t" amount or
now, the bigger hose, can do the filling in 6hrs
that means in 1hr, it has only done then 1/6 in "t" time or
now, the whole job, is a whole, or 1
so.. let us add those rates of each hose together, to see how long they'd take
solve for "t"
in 1hr then, it really has done only 1/8 of the job
if we take the filled pool to be the total job time, or "t"
then the smaller hose in 1hr has only done only 1/8 in "t" amount or
now, the bigger hose, can do the filling in 6hrs
that means in 1hr, it has only done then 1/6 in "t" time or
now, the whole job, is a whole, or 1
so.. let us add those rates of each hose together, to see how long they'd take
solve for "t"