JNH16
23.07.2019 •
Mathematics
Two piers, a and b, are located s km away from each other along a river. a motor boat, with a speed of vkm/hour in still water, is cruising between the two piers. how much time t (in hours) will the motorboat need to get from pier a to pier b and back, if the speed of the current is 5km/hour? find t if:
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Ответ:
Distance:
There = 50
Back = 50
Rate(speed):
There = 25+5
Back = 25-5
50/25+5 = 50/30 = 5/3
50/25-5 = 50/20 = 5/2
5/3+5/2 = Total Time
Total Time = 25/6 Hours
Ответ:
What are the variables?
Step-by-step explanation: