Two boys starts from the same place walking at the rate of 5 kmph and 5.5 kmph respectively in the same direction. What time willtheytaketo be 8.5 km apart?
17 hr
14 hr
12 hr
9 hr
Explanation:
relative speed =5.5−5=0.5 kmph (because they walk in the same direction)
distance =8.5 km
time=distance /speed=8.5/0.5=17 hr
relative speed =5.5−5=0.5 kmph (because they walk in the same direction)
distance =8.5 km
time=distance /speed=8.5/0.5=17 hr