Work and Rate Problems
SSAT Middle Level · Flashcards · Application
SSAT MIDDLE LEVEL · FLASHCARDS
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QUESTION
Two workers together finish in
5
5
5
h. One alone takes
10
10
10
h. How long does the other take alone?
QUESTION
A worker's rate increases by
25
%
25\%
25%
. For the same job, the new time is what fraction of the old time?
QUESTION
Pipe A fills in
6
6
6
h and pipe B fills in
3
3
3
h. How long to fill together?
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ANSWER
2
2
2
h. Combined rate of
1
/
6
+
1
/
3
=
1
/
2
1/6 + 1/3 = 1/2
1/6
+
1/3
=
1/2
tank/h gives time as reciprocal.
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