Answer:
The distance covered is 5200 feet.
Step-by-step explanation:
From the starting stone to the last the distance between them is of 2 feet. There are 50 stones and the distance between the crate and first stone is 3 feet.
He walked to the first stone 3 feet and then came back 3 feet and that totals 6 feet. Again he started moving towards the first stone and then the second stone 3+2= 5
The first stone is
2(3) + 2(1) + 2(2) + 2(3)+.......2( 48) +2(49).
The first term is 6 and the last term is 100 which gives a sum of 6+ 98= 104
Similarly the second term is 8 and the second last is 96 which gives a total of 96+ 8= 104
As there are 50 stones the total distance would be
104* 50= 5200
As Alex went and came back the distance would be 5200 feet.
