3 years ago

Hello I am a student of class 8, and are novel, varog if you contact me, I need help.

Mathematics

1 answer:

Marina CMI [18]3 years ago

5 0

This is not a question.....I am sorry Blavinius , you have ask a proper question that people can understand....

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HELP FOR BRAINIEST AND 50 POINTS

motikmotik

X - speed of the current
40+x - speed with current
40-x - speed against current

t-time
(40+x)*t=100
(40-x)*t=60

40t+xt=100
<span> + 40t-xt = 60
</span> 80t =160
t = 2

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40*2+2x=100
80+2x=100
2x=100-80
2x=20
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Last one bottom !!! :)

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