A, b, c are visiting d's family who are staying 400km away.Each of there walking speed i 20km per hour. What was the entire time involved in travelling
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for A alone it takes 400/20
that is 20 hrs
all other are walking in same speed
so for all it takes 20 hrs
therefore total time involved is 20+20+20
60 hrs
that is 20 hrs
all other are walking in same speed
so for all it takes 20 hrs
therefore total time involved is 20+20+20
60 hrs
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