8.66666666667 is the answer (ten sixes)
Answer:

Step-by-step explanation:
Given


Required
Determine the scale
The scale is calculated using the following ratio:

Substitute values for Scale and Actual Measurements

Divide ratio by 20.5


This implies that: <em>1 inch on scale represents 8 ft in actual measurement</em>
Step-by-step explanation:

- Height ( h ) = 4.5 cm
- Base 1 ( b ) = 5.2 cm
- Base 2 ( b ) = 10.8 cm

- Area of the given trapezium


Plug the known values and then simplify !
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