Javagal, who decided to go to weekened trip should not exceed 8 hours driving in a day. The average speed of forward journey is 40 miles/hr.Due to traffic on sundays, the return journey’s average speed is 30 m/h. How far he can select a picnic spot?

• avg speed for whole trip=2*40*30/30+40=34.28
  distance for picnic spot=34.28*8=274.24miles
• 13 years agoHelpfull: Yes(0) No(14)
• let the distance of the picnic spot from his house be x and the total distance is zx
  total time = 8 hours
  average speed of forward journey is 40 miles/hr
  this means time taken for forward journey = x/40
  similarly return journey’s average speed is 30 m/h
  the time taken for return journey = x/30
  hence total time taken = x/30 +x/40
  x/30 +x/40 =8
  solving we have x = 137.6miles
• 8 years agoHelpfull: Yes(0) No(1)