Explain different types of scales used in maps and plans. Then, calculate the actual length of a desk and the distance between desks given their representation on a plan with a scale of 1:50.

You're on a roll — 3.1.1 • A bar scale (or graphic scale) shows the scale visually as a line segment divided into units, allowing direct measurement on the plan. • A number scale (or ratio scale) expresses the scale as a ratio (e.g., 1:50) or a fraction, indicating that one unit on the plan represents a certain number of units in reality. 3.1.2 The scale 1:50 means that 1 unit of measurement on the plan represents 50 of the same units of measurement in actual size. For example, 1 cm on the plan corresponds to 50 cm in reality. 3.1.3 Step 1: Determine the actual length in centimeters. The desk measures 6 cm on the plan, and the scale is 1:50. Actual length in cm = 6 cm × 50 = 300 cm Step 2: Convert the actual length from centimeters to meters. Since 1 m = 100 cm: Actual length in m = 300 cm100 cm/m = 3 m The actual length of the desk in metres is: 3 m 3.1.4 Step 1: Determine the actual distance in centimeters. The desks are 4 cm apart on the plan, and the scale is 1:50. Actual distance in cm = 4 cm × 50 = 200 cm Step 2: Convert the actual distance from centimeters to meters. Since 1 m = 100 cm: Actual distance in m = 200 cm100 cm/m = 2 m The actual distance between the two learners' desks in metres is: 2 m Drop the next question!