if it took an average man 15 mins to walk 1 mile , then he stopped for a break for 30 seconds then walked half a mile back then stopped for a further 30 seconds and returned to the end point of his original journey , how long has it took him to walk the half mile back ?
u are all presuming he took only 30 secs in his breaks , remember he took 2 of those, so after his last one, how long did it take the man to walk the half mile back to the original destination he was going to, (remember this is the end of the mile not his return back to the halfway point) this is the point you all keep missing!
At the time he stops for his second break he is half a mile from his starting point AND half a mile from his original destination. If he walks at 15mph it will take him 7.5 mins to walk to either of those places.
Your original question is both lacking sufficient data, and ambiguous. You now seem to be specifying a different "half a mile back" from the one referred to in the original question, and you give no indication of his walking speed after the first mile. Go back to school.
can someone do me a favour seperate to this questio, can anyone work out for me how long it would actually take you to go 1/2 a mile if you were travelling at 15mph. I make 4 mins, but cant sense check it ? This has nothing to do with the answet to this q by the way
Jim,
I think I know what is going on - he has half integral spin, so after completing two half turns, he is now inverted, or inside out, or something, hence the confusion :-)
you see now where it gets confusing. All along i have said he had two 30 sec breaks but jims last comment part a and b says only 30 secs i have pasted the words to show u its not me ..
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(a) you still haven't linked to the original source for this question.
(b) How the hell else are we going to interpret "he stopped for a break for 30 seconds" but as "he had a 30-second long break"?!
he only did one half turn nescio the 2nd half turn you are referring to is the continuation of his original journey he only come back on himself the once , you see where i am coming from now .