Two persons starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 8.5km apart, if they walk in the same direction?
A. 17 hrs
B. 22 hrs
C. 25 hrs
D. 12 hrs
Answers
Answered by
6
Answer : A.
The relative speed of the boys = 5.5kmph – 5kmph
= 0.5 kmph
Distance between them is 8.5 km
Time= 8.5km / 0.5 kmph = 17 hrs
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Answered by
1
let
person A speed be = 5kmph
person B speed be = 5.5kmph
Speed of person b relative to A = (speed of B - speed of A )= 5.5kmph - 5kmph= 0.5kmph
seperetion = 8.5/0.5 = 17hour
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