Answer:x 31.5 mm
Step-by-step explanation:I hope this helps
The actual length of the room on the blueprint 31.5mm.
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
According to the given question
35mm represents 10m
⇒ 1m = 35/10
⇒ 1m = 3.5mm
Therefore,
The actual length of the room on the blueprint = 3.5 × 9 = 31.5mm
Learn more about unitary method here:
https://brainly.com/question/22056199
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