Tourist Venn
1. **Problem Statement:** Given $r = 1.38$ cm and $\pi = 3.142$, find the value of $h$ to the nearest first decimal place using logarithm tables.
2. **Understanding the problem:** The problem likely relates to a formula involving $r$, $\pi$, and $h$. Since $h$ is unknown, we need the formula that connects these variables. A common formula involving $r$, $h$, and $\pi$ is the volume or surface area of a cylinder or cone, but since the problem does not specify, we assume the formula is given or implied.
3. **Assuming the formula:** Suppose the formula is $V = \pi r^2 h$ (volume of a cylinder), and we want to find $h$ given $V$ (not provided here). Since $V$ is not given, we cannot proceed without additional information.
4. **Since the problem is incomplete for $h$ calculation, we focus on the second problem about tourists:**
(i) **Venn Diagram Information:**
- Total tourists: 120
- Ship travelers ($V$): 40
- Aeroplane travelers ($A$): 95
- Neither ship nor aeroplane: 20
(ii) **Find number of tourists who traveled only by ship:**
Let $x$ be the number who traveled by both ship and aeroplane.
Using the formula for union:
$$|V \cup A| = |V| + |A| - |V \cap A|$$
Total who traveled by ship or aeroplane is $120 - 20 = 100$.
So,
$$100 = 40 + 95 - x \implies x = 40 + 95 - 100 = 35$$
Number who traveled only by ship:
$$|V| - |V \cap A| = 40 - 35 = 5$$
(iii) **Percentage who traveled only by aeroplane:**
Number who traveled only by aeroplane:
$$|A| - |V \cap A| = 95 - 35 = 60$$
Percentage:
$$\frac{60}{120} \times 100 = 50\%$$
(iv) **Shade area of tourists who have not traveled at least one of the two ways:**
These are tourists who did not travel by ship or aeroplane, i.e., 20 tourists.
Set notation for shaded area:
$$U - (V \cup A)$$
(v) **If anyone who traveled by ship did not travel by aeroplane:**
This means $V$ and $A$ are disjoint sets.
Number who traveled by ship only: 40
Number who traveled by aeroplane only: 95
Neither: 20
Venn diagram would show two non-overlapping circles inside the rectangle.
**Final answers:**
- Number who traveled only by ship: 5
- Percentage who traveled only by aeroplane: 50%
- Shaded area set notation: $U - (V \cup A)$