wesleybenton17 wesleybenton17
  • 15-03-2017
  • Mathematics
contestada

It took John 12 hours riding his bike to make the round trip to his uncle's. If he averaged 20 mph out and 30 mph back, how long did he travel each way? (Round answer to nearest tenth.)

Respuesta :

charlottekrist
charlottekrist charlottekrist
  • 15-03-2017
d=distance traveled one way
t=d/s
d/20 + d/30 = 12
3d+2d=60(20)
5d=720
d=720/5 = 144 mi one way
144/20 = 7.2 hrs at 20 mph
144/30 = 4.8 hrs at 30 mph

Answer Link

Otras preguntas

Anthony bought an 8 foot board. he cut off 3/4 of the board to build a shelf and gave 1/3 of the rest to his brother for an art project .how many inches long wa
how do you solve this
Who was known as the "father of the constitution"? what number president did he become?
what did colonist say the king was unfit to be
How is the nuclear fusion that takes place in the sun different from a chemical reaction? A. It happens at a lower temperature. B. More energy i
interquartile range of 30,31,22,24,23,33
what is the solution to the equation x-12=36
The graph f(x) consists of 14 points. Six of the points lie in quadrant 1 of the coordinate plane. If f(x) is an odd fundtion, what is the greatest number of po
can someone help me with this
Why isn't there prostate cancer awareness?