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Dear Student,

To solve this question we need to find the distance between the given points using the scale.
Once we find the distance in cm, we need to multiply it with 300000 to get the actual distance.

example lets say distance between woodhall and boston is 3 cm 
then actual distance between two cities= $3\times 300000$
=900000 

you can solve the other parts similarly.

Regards,