mccdp55
23.02.2022 •
Mathematics
Jim's speedboat can travel 24 miles upstream against a 4 mph current. In the same amount of time it travels 26 miles downstream with a 4 mph current speed. Find the speed of Jim's boat.
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Ответ:
speed of the boat = 100 mph
Step-by-step explanation:
Let x = speed of the boat
upstream speed = x - 4
downstream speed = x + 4
time = 24/(x - 4) = 26/(x + 4)
Cross multiply:
24(x + 4) = 26(x - 4)
24x + 96 = 26x - 104
104 + 96 = 26x - 24x
200 = 2x
x = 100 mph
Ответ: