Answers

  • Brainly User
2014-05-14T21:34:29+05:30
Question:
I go from my home to office at speed of 95km\h for 130 min and I come back at speed of 65km/h in 3 hrs 20 min. Find distance of office from my home.


Solution :
     First let me tell you the difference between the Distance and Displacement .
Distance between two points is the total distance traveled while as the displacement is the shortest distance between two points .
So Just remember Distance is greater than or less than displacement.

         office to home speed = 95 km/hr
                                     = 95*5/18 m/s
         time taken from home to reach office = 130 minutes
                                                         = 130 * 60s
                                                         = 7800 s
        office to home speed = 65 km/hr
                                         = 65*5/18 m/s
         Time taken from office to home = 3 hr 20 minutes
                                                       = 3*60*60 s + 20*60 s
                                                     =  (10800 + 1200 )s
                                                   = 12000s
           we know that ,
                         Velocity = distance traveled / time taken
                         65*5/18 m/s = distance from office to home / 12000 s
                         => distance from office to home = 65*(5/18 )*12000 m
                                                                       = 216666.67 m



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  • Brainly User
2014-05-16T10:03:50+05:30
The distance between his home and office is 216.667 km
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