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16 Apr 2018, 00:54
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Difficulty:
55%
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Question Stats:
48% (00:55) correct
52%
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wrong
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Which of the following relationships must be inversely proportional to each other?
I. Work done and working time
II. Speed and Traveling Time
III. Profit and Cost
A. I only
B. II only
C. III only
D. II and III
E. I and II
I. Work done and working time
II. Speed and Traveling Time
III. Profit and Cost
A. I only
B. II only
C. III only
D. II and III
E. I and II
16 Apr 2018, 12:11
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Inverse proportion means that if x increases, y decreases.
Let's take a look at the three relationships:
I. Work done and working time -> If we increase the amount of work done there is no way the working time will decrease. The working time will likely increase, but it could also stay constant if we increase the work rate. However, the working time can not decrease.
II. Speed and traveling time -> If we increase the speed the traveling time must be reduced. Therefore, this is a valid choice.
III. Profit and cost -> If we increase the profit it doesn't have to cause a drop in costs. We could also increase our revenues. Hence, its not a valid choice because they don't have to be inversely proportional to each other
It follows that B) is the correct choice.
I hope that helps
Let's take a look at the three relationships:
I. Work done and working time -> If we increase the amount of work done there is no way the working time will decrease. The working time will likely increase, but it could also stay constant if we increase the work rate. However, the working time can not decrease.
II. Speed and traveling time -> If we increase the speed the traveling time must be reduced. Therefore, this is a valid choice.
III. Profit and cost -> If we increase the profit it doesn't have to cause a drop in costs. We could also increase our revenues. Hence, its not a valid choice because they don't have to be inversely proportional to each other
It follows that B) is the correct choice.
I hope that helps
16 Apr 2018, 13:39
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Which of the following relationships must be inversely proportional to each other?
I. Work done and working time W=R*T
II. Speed and Traveling Time V=S/T
III. Profit and Cost P=R-C
Only V and 1/T are inversely proportional
B. II only
I. Work done and working time W=R*T
II. Speed and Traveling Time V=S/T
III. Profit and Cost P=R-C
Only V and 1/T are inversely proportional
B. II only
