A person plans to row a boat from point A on one side of a straight river to a point B on the other side, as shown. All distances are measured in feet. rowacross Suppose the river is 300 feet wide and the person can row at a speed of 5 feet per second. Express the time needed for the person to row from point A to point B as a function of x.

Step-by-step explanation:

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Solution

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Here V

R

= velocity of river

V

M

= velocity of man in still water = 2m/s (given)

from figure it is clear that

sinθ=

V

M

V

R

, where θ=60 degree

⟹V

R

=

3

m/s

from figure it is evident that

V

M

cosθ×t=1000m

⟹t=1000 s

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175

a ≈ 172.05

step-by-step explanation:

the pictures.