there are 5 data in the example,each data is formated, you should change it so you can look for avg,med,range

wow

the average is for the total amount of time; consider the h/m/s as total seconds

now when they say average does it mean average for every seconds,hour,min ex for min (15+47+17+32+2)/5 so average for min=56.5 but here its 35 (Average: 01|35|15)

No it doesn't mean average for every seconds,hour,min. The average is global.
BTW your calculation "(15+47+17+32+2)/5 so average for min=56.5" seems wrong but here it doesn't matter.
Be sure there are no error in the tests so in your example the average is "01|35|15" which means that on average the team has run in 1h 35mn 15s.

can anyone explain the explanation to me (i didnt quite got it)

their example input was "01|15|59, 1|47|6, 01|17|20, 1|32|34, 2|3|17" and answer is "Range: 00|47|18 Average: 01|35|15 Median: 01|32|34"

now when they say average does it mean average for every seconds,hour,min ex for min (15+47+17+32+2)/5 so average for min=56.5 but here its 35 (Average: 01|35|15)

for median its the middle term of the set so for median of minute it should be 17 becoz
arranging in ascending order the minutes=[3 15 17 32 47] so the middle term for minute is 17 not 32

same question could you pls tell me if someone has told you the answer ?
thanks in advance

Because 127765 - 6 = 127759

find the sum of all the integers between and including them