Thanks everyone.
Yes India, it did say 1,000ft, I copied and pasted it.
I'm pretty sure 1,500 was an option for the answer. So I think the posters are right who say the stated ELR is a red herring to test you know that DLR is the relevant figure. A cheeky question if you ask me! But effective in proving a point... if only the explanation on the site had been as thorough as the one I've got here
