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V=pir^(2)h
The formula gives the volume 
V of a right circular cylinder with radius 
r and height 
h. If the volume of a right circular cylinder with a radius of 4 feet and a height of 30 feet is 
a pi cubic feet, what is the value of 
a ?

V=πr2h V=\pi r^{2} h \newlineThe formula gives the volume V V of a right circular cylinder with radius r r and height h h . If the volume of a right circular cylinder with a radius of 44 feet and a height of 3030 feet is aπ a \pi cubic feet, what is the value of a a ?

Full solution

Q. V=πr2h V=\pi r^{2} h \newlineThe formula gives the volume V V of a right circular cylinder with radius r r and height h h . If the volume of a right circular cylinder with a radius of 44 feet and a height of 3030 feet is aπ a \pi cubic feet, what is the value of a a ?
  1. Identify given values and formula: Identify the given values and the formula to use.\newlineWe are given the radius r=4 r = 4 feet and the height h=30 h = 30 feet. The volume V V of a right circular cylinder is given by the formula V=πr2h V = \pi r^2 h .
  2. Substitute given values into formula: Substitute the given values into the formula.\newlineUsing the given radius and height, we substitute into the formula:\newlineV=π×(4 feet)2×(30 feet)V = \pi \times (4 \text{ feet})^2 \times (30 \text{ feet})
  3. Calculate the volume: Calculate the volume VV.\newlineFirst, square the radius:\newline(4 feet)2=16 feet2(4 \text{ feet})^2 = 16 \text{ feet}^2\newlineThen, multiply by the height and π\pi:\newlineV=π×16 feet2×30 feetV = \pi \times 16 \text{ feet}^2 \times 30 \text{ feet}\newlineV=π×480 feet3V = \pi \times 480 \text{ feet}^3
  4. Identify value of 'a' in expression: Identify the value of a in the expression V = a imes ext{π} ext{ cubic feet}.\newlineFrom the previous step, we have V = ext{π} imes 480480 ext{ feet}^33. This means that a is the coefficient of ext{π} in the volume expression, which is 480480.

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