without taking any rest a person reached his destination at 15 km/hour average speed. if he reached his destination at 12 km/hour average speed with taking rest. then how much time he took rest?
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Given that,
Without any stoppage a person travels a certain distance at an average speed v=42 km/hr
With any stoppage a person travels a certain distance at an average speed v=28 km/hr
We know that,
Difference in distance traveled in one hour
D=41−28=14 km
Which is lost due to stoppages.
So, Stoppages time is
t=
42
14
hr
Time in minutes is
t=
42
14
×60
t=20 min
He stop in 20 min.
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