I would appreciate your help with these problems, so I could maybe help my child.
Both of these problems involve working with rates. For the first problem, water drains through the first hole at the rate of one-third of a tub per hour. Water drains through the second hole at the rate of one-sixth of a tub per hour. Thus if both holes are open then the water drains out at a rate of
For the second problem suppose that the wind speed is x miles per hour. Thus when flying with the wind the airplane travels at 400 + x miles per hour and when flying against the wind it travels at 400 - x miles per hour.
At 400 + x miles per hour the plane will cover 900 miles in
At 400 - x miles per hour the plane will cover 700 miles in
Since these times are equal.
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