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Question 192527This question is from textbook Gmat for dummies
: There are two dock workers, Alf and Bob. Alf can load 16 tons of steel per day, and Bob can load 20 tons per day. If they each work 8-hour days, how many tons of steel can the two of them load in one hour, assuming they maintain a steady rate?
I tried to apply the formula, 1/t1+1/t2=1/t3. With t1 being the time taken by the 1st person, t2 the second and t3 the time it takes both to complete the job.
This question is from textbook Gmat for dummies
Answer by nerdybill(7384)   (Show Source):
You can put this solution on YOUR website! There are two dock workers, Alf and Bob. Alf can load 16 tons of steel per day, and Bob can load 20 tons per day. If they each work 8-hour days, how many tons of steel can the two of them load in one hour, assuming they maintain a steady rate?
.
Alf:
16 tons per day
or
16 tons per 8 hours
.
Bob:
20 tons per day
or
20 tons per 8 hours
.
In ONE hour, working together they can load:
16/8 + 20/8
= 36/8
= 4.5 tons
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