Exercise 8d

This picture shows the edge of the platform. It is made of bricks. Can you think why it is painted white?
Inspectors need to know the length of platforms. Can you remember why? In the last exercise you had to work out the maximum length of a train.
You could measure a platform by pacing it, but let's imagine that you have a bad leg.

Each brick is 9cm wide. There are 1100 bricks along the edge of the platform.

Question: How long is the platform in metres?

Answer: 199m 99m 9990m  

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