If the speed of the stream is x
Time is given by d/r , where r is the rate and d is the distance;
Rate for upstream = (15-x) mph and that of down stream is (15 +x) mph
The time taken will be the same;
Thus; 2/(15-x) = 4/(15+x)
cross multiplying;
30 +2x = 60 -4x
6x = 30
x =5
Therefore the rate of the river is 5 mph
Careful when choose ( / ).
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Answer:
i
Step-by-step explanation:
This is the answer you get when you square and you get a negative number.
Answer:
A. 0
Step-by-step explanation:
They're parallel lines not a rectangle. I don't really know what you are asking for.
Answer:
One side is 9 m
Step-by-step explanation:
Perimeter = 36 m
Perimeter = 4a
a = P/4
a = 36/4
a = 9
