Question 281723: A BOAT TRAVELING AT A SPEED OF 36 KM PER HOUR. IT HAS TO TRAVEL A DISTANCE OF 210 KM. HOW LONG WILL IT TAKE Found 2 solutions by Alan3354, PRMath:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! A BOAT TRAVELING AT A SPEED OF 36 KM PER HOUR. IT HAS TO TRAVEL A DISTANCE OF 210 KM. HOW LONG WILL IT TAKE
You just need to know ONE equation about rate, time and distance.
You should always remember this equation:
Let's put it in terms of variables:
Let's call Rate: R
Let's call Time: T
Let's call Distance: D
So now we have:
or RT = D
What if you wanted to solve for R? Can you see that if you had RT = D that you could solve for "R" just by dividing T from both sides of the equation:
RT = D
What if you wanted to solve for T? Can you see that if you had RT = D, that you could solve for "T" just be dividing R from both sides of the equation:
RT = D
So now from just ONE equation: RT = D, you can "switch it around" so to speak and solve for Rate or you can solve for T.
In this problem, you want to solve for TIME. So, thinking of our one equation of RT = D, we realize we want to solve for T. Therefore, we should use this equation:
What do we know?
We know the Rate is 36 km per hour. R = 36
We know the Distance is 210 miles. D = 210
Let's plug that info in:
SO the boat must travel for 5 hours and .83 of an hour. OR....
5 hours and
.83 of 60 minutes which is: 49.8 minutes ()
The boat must travel for 5 hours and 49.8 minutes.
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