Find the volume of a right circular cone that has a height of 11.7in and a base with a circumference of 18.8in. Round your answer to the nearest tenth of a cubic inch.Answer: in3
Q. Find the volume of a right circular cone that has a height of 11.7in and a base with a circumference of 18.8in. Round your answer to the nearest tenth of a cubic inch.Answer: in3
Find Radius of Base: First, we need to find the radius of the base of the cone. The formula for the circumference of a circle is C=2πr, where C is the circumference and r is the radius. We can rearrange this formula to solve for r: r=2πC.
Calculate Radius: Now, let's calculate the radius using the given circumference of 18.8 inches: r=2π18.8in. We can approximate π as 3.14159.
Calculate Volume Formula: Performing the calculation: r=2×3.1415918.8in≈6.2831818.8in≈2.993in. This is the radius of the base of the cone.
Plug in Values: Next, we use the formula for the volume of a cone, which is V=(31)πr2h, where V is the volume, r is the radius, and h is the height.
Calculate Volume: We plug in the values for r and h into the volume formula: V=31π(2.993in)2(11.7in).
Square Radius: Now, we calculate the volume: V=(31)×3.14159×(2.993 in)2×11.7 in.
Multiply by Height and π: First, square the radius: (2.993in)2≈8.958in2.
Round the Answer: Then, multiply by the height and π: V≈(1/3)×3.14159×8.958 in2×11.7 in≈3.14159×2.986 in2×11.7 in≈104.187 in3.
Round the Answer: Then, multiply by the height and π: V≈(1/3)×3.14159×8.958 in2×11.7 in≈3.14159×2.986 in2×11.7 in≈104.187 in3. Finally, we round the answer to the nearest tenth: V≈104.2 in3.
More problems from Evaluate variable expressions: word problems