Answered

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Jane took 10 min to drive her boat upstream to​ water-ski at her favorite spot. Coming back later in the​ day at the same boat​ speed took her 5 min. If the current in that part of the river is 10 km per​ hr, what was her boat speed in still​ water?

Sagot :

alo214

Answer: B = 15 kph or 15 kph

step by step

(b-5)*10=(b+5)*5

10b-50=5b+25

5b=75

b=15 kph in still water

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