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- In a stream running at 2kmph,a motar boat goes 6km upstream and back again to the starting point in 33 minutes.
Question 1:
In a stream running at 2kmph,a motar boat goes 6km upstream and back again to the starting point in 33 minutes.find the speed of the motarboat in still water.
A. 10
B. 12
C. 20
D. 22
Feedback Let the speed of the motarboat in still water be x kmph.then, 6/x+2 +6/x-2=33/60
11x2-240x-44=0
11x2-242x+2x-44=0
(x-22)(11x+2)=0
x=22.
11x2-240x-44=0
11x2-242x+2x-44=0
(x-22)(11x+2)=0
x=22.
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