What is the actual height (in metres) of a wall that measures 6cm on a drawing with a scale of 1:20? *
1 point
a) 6 metres
b) 20 metres
c) 26 metres
d) 120 metres
1:20 = 6:120
To find the actual height of the wall, we need to use the scale provided.
The scale of 1:20 means that 1 unit on the drawing represents 20 units in real life.
Given that the wall on the drawing measures 6cm, we can set up a proportion to find the actual height:
6cm / 1 unit = x metres / 20 units
Cross-multiplying, we get:
6cm * 20 units = x metres * 1 unit
120 units = x metres
Therefore, the actual height of the wall is 120 metres.
The correct answer is d) 120 metres.
To find the actual height of the wall, we need to use the scale provided. The scale 1:20 means that for every 1 unit on the drawing, it represents 20 units in real life.
In this case, the height of the wall on the drawing is 6cm.
To find the actual height in meters, we need to convert the measurement from centimeters to meters. Since there are 100 centimeters in a meter, we divide 6 by 100 to convert it to meters. The height on the drawing is 0.06 meters.
Next, we can use the scale of 1:20 to find the actual height. We know that for every 1 unit on the drawing, it represents 20 units in real life. In this case, the height on the drawing is 0.06 meters, which represents 1 unit.
To find the actual height, we multiply 0.06 by 20.
0.06 x 20 = 1.2
Therefore, the actual height of the wall is 1.2 meters.
So the correct answer is:
a) 6 metres
Note: The measurements on the drawing are given in centimeters, so it's important to convert them to meters before using the scale.