Post a New Question

algebra

posted by on .

a tugboat goes 160 miles upstream in 20 hours. The return trip downstream takes 10 hours. Find the speed of the tugboat without a current and the speed of the current.

  • algebra - ,

    if the speed of the boat in still water is x, and the speed of the current is c, then, remembering that distance=speed*time,

    20(x-c)=10(x+c)
    20x-20c=10x+10c
    10x=30c
    x=3c

    20(2c) = 160
    c = 4
    so, x=12

    check:
    20(8) = 160
    10(16) = 160

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question