about cover 14 km upstream and 20 km downstream in 7 hour also it cover 22 km upstream and 44 km downstream in 10 hours find its speed in still water and of that stream
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Step-by-step explanation:
The formula of speed of still water = 0.5(a+b)
Speed of that stream = 0.5(a-b);
Here a = Speed of upstream
b = speed of downstream;
Now putting the values in above formula;
Case I
Speed of still water = 0.5 (14+20) = 17 km/hr.
Speed of stream = 0.5(20-14) = 3 km/hr.
Case II
Speed of still water = 0.5 (44+22) = 33 km/hr.
Speed of stream = 0.5(44-22) = 11 km/hr.
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