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I just joined this Forum to get an answer to a question really, it's not for Collage or Uni or anything just a curiosity really.

Mathematics isn't one of my strong points and I hope this is in the right section.

What I'd like to know is.... If an Object is 3 miles away, and this is what complicates things a little (for me at least), it is 3mm wide by 4mm heigh through a pair of Binoculars (15x70).

What size would the Object be?

I'm also not 100% sure of the distance so if anyone could help me out with this could you also do the same thing but with the Object at 2 miles and also 4 miles away if possible?

If anyone can help me with this I'd be really grateful.