The current in a river is 1.0 meters/second. Britney swims 300 meters against the current. If she normally swims with a speed of 2.0 meters/second in still water, how long does it take her to complete the trip? A.
100 seconds
B.
200 seconds
C.
400 seconds
D.
300 seconds
2 answers:
Answer:
D) 300 seconds
Step-by-step explanation:
if the river is traveling 1 m/s and Britney is traveling 2 m/s, then half of her speed would be canceled out, resulting in her only traveling 1 m/s taking her 300 seconds or 5 minutes to complete the trip.
Her speed against current= speed in still water - speed of current = 2 - 1 =1 meter/seconds Time taken = distance/ speed = 300/1 = 300 seconds
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