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2 years ago

I need help immediately!!

Mathematics

1 answer:

Vika [28.1K]2 years ago

3 0

Step-by-step explanation:

I am not sure about the meaning of the last question, but we will get there.

so, his own speed is 8 mph.

d = the given distance (half-trip) in miles.

time = distance / speed

t = time to travel downstream in hours

t + 2 = d/(8 - 3)

t = d/(8 + 3)

we use the second equation in the first

d/(8 + 3) + 2 = d/(8 - 3)

d/11 + 2 = d/5

5d/11 + 10 = d

5d + 110 = 11d

6d = 110

3d = 55

d = 55/3 = 18.33333333...

he will row 2×d (round trip) = 36.6666666... miles =

= 36 2/3 miles

t = d/(8 + 3) = 18.3333333... / 11 =

= 1.666666666... =

= 1 2/3 hours =

= 1 hour 60×2/3 minutes =

= 1 hour 120/3 = 1 hour 40 minutes

it will take him 1 hour 40 minutes to row downstream.

he will row 36 2/3 miles in total.

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Step-by-step explanation:

Alright, lets get started.

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