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Readme [11.4K]
3 years ago
11

One car travels 20km/hr faster than another. While one of them travels 240km, the other travels 180km. Find the speed of the fas

t car.
Mathematics
2 answers:
VLD [36.1K]3 years ago
4 0

Answer:

Slow car = 60mph

Fast car = 80mph

Step-by-step explanation:

Slow car = x mph

Fast car = x + 20 mph

Time = y

xy = 180

xy + 20y = 240

180 + 20y = 240

60 = 20y

y = 3

Since they traveled for 3 hours,

3x = 180

x = 60

Slow car = 60mph

Fast car = 80mph

denis23 [38]3 years ago
4 0

Answer:

80 km/h

Step-by-step explanation:

speed of fast car= f

speed of the other car= s

  • f= s+20
  • 240/f= 180/s
  • 240/(s+20)= 180/s
  • 240s= 180s+180*20
  • 60s= 180*20
  • s=3*20
  • s= 60 km/h
  • f=60+20= 80 km/h
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