SOLUTION: Two ships travelling from Dumaguete to Cagayan de Oro differ in average speed by 10 kph. The slower ship takes 3 hours longer to travel a 240 kilometer route than for the faster sh

Question 1045713: Two ships travelling from Dumaguete to Cagayan de Oro differ in average speed by 10 kph. The slower ship takes 3 hours longer to travel a 240 kilometer route than for the faster ship to travel a 200 kilometer route. Find the speed of the slower ship. Hint: Construct an equation with time t as the variable.
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
From the hint that you gave, it should follow that
.
===> .
<===> , after simplifying;
<===>
==> t = 5 hours
===> The speed of the slower ship is .

ALTERNATE SOLUTION (without initially resorting to t):
Let r = speed of the slower ship.
===> r + 10 = speed of the faster ship
===>
===> r = 30 kph, which gives the speed of the slower ship directly.
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