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Answer:
Square foot need to be painted, if width is equal to
feet
Step-by-step explanation:
Complete question -
Maya wants to paint one wall in her room blue. The wall is 22,9 feet high, and have no doors or windows. How many square feet need to be painted?
Solution -
The square feet need to be painted will be equal to the product of height and width of the wall i.e surface area of the wall
Let the width of the wall be feet
Surface area of the wall
Where H is the height of the wall in feet
W is the width of the wall in feet
Substituting the given values in above equation, we get -
Square foot.
Thus, Square foot need to be painted
Answer: Time taken by pipe C to empty the tank = 5 hours.
Step-by-step explanation:
Pipe A can fill a tank in 5 hours.
Let time taken by Pipe C = x ( hours)
Time taken by Pipe B = x-2 ( hours)
Now, with all 3 pipes open, it takes 3 hours to fill the tank, it can be represented as
Time cannot be negative,
So, x=5
Thus, Time taken by pipe C to empty the tank = 5 hours.