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Sagot :
Answer: Boat=10mph, Current Speed=2mph
Step-by-step explanation:
Downstream:
2hrs - 24miles => 1hr - 12miles, ie, 12mph
Upstream:
4hrs - 32miles => 1hr - 8 miles, ie, 8mph
Downstream speed is the speed of boat (b) + current speed (c)
Upstream speed is the speed of boat (b) - current speed (c)
So we have a set simultaneous equation:
b + c = 12
b - c = 8
Adding them together, 2b = 20, b = 10.
Replacing the value of b in one equation, 10 + c = 12, c=2.
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