Joanne drinks a pint of milk. Debra drinks a liter of milk. Who drinks more?
2 answers:
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Answer:
500/25 = 100/y
100/5 = 100/y
20 = 100/Y
200/1 = 100/Y
By cross multiplication
200 × Y = 100 × 1
Y = 100 /200
Y = 1/2
The speed of the current in a river is 6 miles per hour
<em><u>Solution:</u></em>
Given that,
Speed of boat in still water = 20 miles per hour
Time taken = 3 hours
Distance downstream = 78 miles
To find: Speed of current
<em><u>If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: </u></em>
Speed downstream = (u + v) km/hr
Speed upstream = (u - v) km/hr
<em><u>Therefore, speed downstream is given as:</u></em>
We know that,
Speed downstream = (u + v)
26 = 20 + v
v = 26 - 20
v = 6 miles per hour
Thus speed of the current in a river is 6 miles per hour