Problema Solution
The distance traveled varies directly as the time. If the distance traveled is 3 laps when the time is 4 min, find the number of laps when the time is 7 min.
Answer provided by our tutors
We say that a quantity A varies directly as a quantity B, if, when B changes, A changes in the same ratio.
Let 'x' represent the number of laps when the time is 7 minutes
3 : 4 = x : 7
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x = 21/4
x = 5 1/4 laps
In 7 minutes the distance traveled is 5 1/4 laps.