Oh, The Grand Old Duke Of York!
Oh, The Grand Old Duke Of York,
He had ten thousand men.
He marched them up
To the top of the hill,
And he marched them down again.
By o'clock he was of the way up. By o'clock he was of the way up. Assuming he walked at a constant pace, when did he start?
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1 solution
2 o'clock to 4 o'clock they can go ( 3/4 - 1/3 ) = 5/12
So, In two hours , they can go = 5/12
Now,
5/12 way go in = 2 hours
1 " " " = ( 2*12 ) / 5
So, 1/3 " " " = ( 2 * 12 ) / ( 5 * 3 ) = 1.6
Now ,
1.6 * 60 = 96 minute's .
So, they started in ( 96 minute's ) 1:36 hour's previous from 2 o'clock .
That is why the answer is 12:24 h.