| Directions: Q. 21 to 25 |
| A scale drawing of an object is the same shape at the object but a different size. |
| The scale of a drawing is a comparison of the length used on a drawing to the length it represents. The scale is written as a ratio. The ratio of two corresponding sides in similar figures is called the scale fact |
| Scale factor = length in image/ corresponding length in object |
| If one shape can become another using revising, then the shapes are similar. |
| Hence, two shapes are similar when one can become the other after a resize, flip, slide or turn. In the photograph below showing the side view of a train engine. Scale factor is 1 : 200. |
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| This means that a length of 1 cm on the photograph above corresponds to a length of 200 cm or 2 m, of the actual engine. The scale can also be written as the ratio of two lengths. |
| Based on the above information, answer the following questions |
A) 22 cm
B) 220cm
C) 220m
D) 22m
Correct Answer: D
Solution :
Given, scale factors = 1: 200 It means that length of 1 cm on the photograph above corresponds to a length of 200 cm (or 2 m) of the actual engine. Since, length of the model is 11 cm. Therefore, the overall length of the engine \[=\text{ }11\text{ }\times \text{ }200\text{ }=\text{ }2200\text{ }cm\text{ }=\text{ }22\text{ }m\]
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