Answer:
Width = 4ft
Step-by-step explanation:
Area of the rectangular mural = Length × Breadth
7 ft tall and 11 ft wide.
(11 - 2W)(7 - 2W) = 88
77 -22W - 14W + 4W² = 88
77 -36W + 4W² = 88
4W² - 36W + 77 - 88
= 4W² - 36W - 11
W = 4ft
5.3 minutes.
First, let's calculate the volume of the tank. That will be the area of the base multiplied by it's length. And since it's base is a circle, the area is pi*r^2. So:
V = l*pi*r^2
V = 3.5 * pi * (2.2/2)^2
V = 3.5 * pi * (1.1)^2
V = 3.5 * pi * 1.21
V = 4.235 * pi
V = 13.30464489
So the tank has a volume of about 13.3 ft^3. Now simply divide that volume
by the rate of incoming fluid. So
13.3 / 2.5 = 5.32
Rounding to 2 significant figures gives a time of 5.3 minutes.
Hmmmm
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