When the scale is 1:800, the map/drawing length of 24m is ........ cm
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Step-by-step explanation:
In this section we look at plans drawn to a particular scale.
A scale is used to represent real life measurements on the smaller plan.
Converting measurements
In the example below, we see how to work out "real life" measurements from a plan.
On the left is the plan for a room. The scale for this plan is 1 : 200.
This means that 1 cm on the plan represents 200 cm (or 2 m) in real life.
To work out the dimensions of the room in real life, we need to measure the room on the plan.
The room measures 3 cm by 2 cm.
Because the scale is 1 : 200, the real life measurements will be 200 times larger.
The length of the room in real life must be 3 cm × 200 = 600 cm or 6 m
The width of the room in real life must be 2 cm × 200 = 400 cm or 4 m
Perimeters and Areas
When working out perimeters and areas, it is best to convert to the "real life" measurements first, and then do the calculations.
In the plan above, we worked out that the "real life" dimensions of the room are 6 m by 4 m.
The perimeter of this room must be 6 m + 4 m + 6 m + 4 m = 20 m.
The area of this room must be 6 m × 4 m = 24 m².
myself Veena
class 9th
indian