SOLUTION: A ship leaves a harbour and sails at 25km/h. Another ship leaves 45 minutes later and sails in the same direction at 28 km/h After how long will the second ship overtake the fir

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Question 861804: A ship leaves a harbour and sails at 25km/h.
Another ship leaves 45 minutes later and sails in the same direction at 28 km/h
After how long will the second ship overtake the first?

Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
A ship leaves a harbour and sails at 25km/h.
Another ship leaves 45 minutes later and sails in the same direction at 28 km/h
After how long will the second ship overtake the first?
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1st ship DATA:
rate = 25 km/h ; time = t hrs ; distance = 25t km
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2nd ship DATA:
rate = 28 km/h ; time = (t-(3/4)) hrs ; distance = 28(t-(3/4)) km
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Equation to find "t"::
25t = 28t - 21
----
3t = 21
t = 7 hrs:: time to catch the 1st car
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Cheers,
Stan H.
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