State which of the measurements given is the best estimate for \( \begin{array}{l}\text { a) the height of a lamp post. } \\ 6 \mathrm{~cm} \quad 60 \mathrm{~cm} \quad 6 \mathrm{~m} \quad 60 \mathrm{~m}\end{array} \) \( 10 \mathrm{~g} \quad \begin{array}{l}\text { b) the mass of a pear. } \\ 100 \mathrm{~g} \quad 1 \mathrm{~kg} \\ \text { c) the amount of water in a filled kettle. } \\ 20 \mathrm{ml} \quad 200 \mathrm{ml} \quad 2 \text { litres } \quad 20 \text { litres }\end{array} \)

Certainly! Let's evaluate each measurement to determine the most appropriate estimate based on typical real-world scenarios. ### a) **The Height of a Lamp Post** **Options:** - 6 cm - 60 cm - **6 m** - 60 m **Best Estimate:** **6 meters** **Reasoning:** Lamp posts are generally tall structures designed to illuminate streets, parks, or other public areas. A height of **6 meters** is typical for standard lamp posts, making it the most appropriate choice. The other options are either too short (centimeters) or excessively tall (60 meters). --- ### b) **The Mass of a Pear** **Options:** - 10 g - **100 g** - 1 kg **Best Estimate:** **100 grams** **Reasoning:** A typical pear weighs around **100 grams**. An estimate of **10 grams** is too light for a fruit of this size, while **1 kilogram** would be unusually heavy for a single pear. --- ### c) **The Amount of Water in a Filled Kettle** **Options:** - 20 ml - 200 ml - **2 liters** - 20 liters **Best Estimate:** **2 liters** **Reasoning:** Standard household kettles usually hold about **2 liters** of water. **20 milliliters** and **200 milliliters** are too small for practical use, and **20 liters** is excessively large for a typical kettle. --- **Summary of Best Estimates:** - **a)** 6 m - **b)** 100 g - **c)** 2 litres