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A fire in a building B is reported ...

A fire in a building `B` is reported on telephone to two fire stations `P` and `Q` , 20km apart from each other on a straight road. `P` observes that the fire is at an angle of `60o` to the road and `Q` observes that it is at an angle of `45o` to the road. Which station should send its team and how much will this team have to travel?

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