To solve these problems, we apply geometrical formulas and relationships. Here is how to approach each question:
1. Height of the Cone
Given:
- Diameter \(d = 10 \text{ cm}\) β Radius \(r = \frac{d}{2} = 5 \text{ cm}\)
- Slant height \(l = 13 \text{ cm}\)
We can use the Pythagorean theorem: \[ l^2 = h^2 + r^2 \] Substituting the known values, \[ 13^2 = h^2 + 5^2 \] \[ 169 = h^2 + 25 \] \[ h^2 = 169 - 25 = 144 \] \[ h = \sqrt{144} = 12 \text{ cm} \]
Height of the cone: 12 cm.
2. Calculate Length \(d\)
We have:
- \(l = 30 \text{ in}\)
- \(w = 20 \text{ in}\)
- \(h = 18 \text{ in}\)
- \(x = 36.1 \text{ in}\)
Using Pythagorean theorem in three-dimensional space, \[ d = \sqrt{w^2 + h^2 + x^2} \] Substituting the known values: \[ d = \sqrt{20^2 + 18^2 + 36.1^2} = \sqrt{400 + 324 + 1307.21} = \sqrt{2031.21} \] Calculating, \[ d \approx 45.0 \text{ in} \]
Length of \(d\): 45.0 in.
3. Height of the Pyramid
Given:
- Lateral edge length \(e = 25 \text{ in.}\)
- Slant height \(s = 24 \text{ in.}\)
To find \(r\), the radius of the base, since \(r\) and \(h\) can be connected through the Pythagorean theorem: \[ e^2 = r^2 + h^2 \] And: \[ s^2 = \frac{1}{2}b^2 + h^2 \quad (b = \text{base side length}) \] For a square pyramid: \[ b = 2r \] Substituting: \[ s^2 = \frac{1}{2}(2r)^2 + h^2 = 2r^2 + h^2 \] Now substituting into equations, we can solve for \(r\) from the height equation or express \(h\) in terms of \(r\).
Assuming \(s\) relates directly to height, We want: \[ h = \sqrt{e^2 - r^2} \] By substituting the found \(s\) equation to isolate \(h\): \[ h = \sqrt{r^2} = 24, (Hyp. height calculation) \] Rounding to the nearest whole number, the height of the pyramid is 24.
4. Length of the Edge of the Square Base
Using the Pythagorean theorem here: Given:
- Height \(h = 321 \text{ ft}\)
- Slant height \(s = 436.5 \text{ ft}\)
We find: \[ s^2 = \left(\frac{b}{2}\right)^2 + h^2 \] Let \(b\) be the edge length to solve for it: \[ 436.5^2 = \left(\frac{b}{2}\right)^2 + 321^2 \] Calculating: \[ 191,195.25 = \frac{b^2}{4} + 103,041 \] Re-arranging: \[ \frac{b^2}{4} = 191,195.25 - 103040 = 88255.25 \] Hence: \[ b^2 = 353020.99 \] \[ b \approx 594 \text{ ft} \text{ (Finding square root)} \] Rounding: Length of edge of square base: 594.0 ft.
5. Longest Straw in the Juice Can
Given:
- Height \(h = 122 \text{ mm}\)
- Diameter \(d = 52 \text{ mm}\) β Radius \(r = 26 \text{ mm}\)
To find the longest straw (the diagonal in a cylinder), we apply: \[ \text{Diagonal} = \sqrt{h^2 + (2r)^2} \] Substituting values, \[ \text{Diagonal} = \sqrt{122^2 + 52^2} = \sqrt{14884 + 2704} = \sqrt{17588} \] Calculating, \[ \text{Diagonal} \approx 132.6 \text{ mm} \]
Longest straw that can fit completely inside the juice can: 132.6 mm.
Please let me know if you need further explanations!