rerika01 wrote:If the speed of x meters per second is equivalent to the speed of y kilometers per hour, what is "y" in terms of "x"?
a) 5x/18
b) 6x/5
c) 18x/5
d) 60x
e) 3,600,000x
What is the easiest way to tackle something like this?
Thanks!
We can plug in values.
Let x=5 meters per second.
Over 1 minute, 60*5 = 300 meters are travelled.
Over 1 hour, 60*300 = 18,000 meters are travelled.
Since 18,000 meters = 18 kilometers, y=18. This is our target.
Now we plug x=5 into the answers to see which yields our target of 18.
Only answer choice
C works:
18x/5 = (18*5)/5 = 18.
The correct answer is
C.
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