Adam and Harry are travelling from city X to city Y in their respective cars. Adam reaches city Yin 3
hours whereas Harry reaches 45 minutes after Adam. If the speed of Harry's car is less than Adam's car by
12 km/hr, find the speed of Adam's car.
Answers
Answer:
Answer:
Distance b/w X and Y = Z km
Adam takes time = 3 hrs
Harry takes time = 45/60 = 0.75 hrs
Speed of Adam's Car = m
Speed of Harry's Car = m - 12
SpeedSpeed = \frac{Distance}{Time}
Time
Distance
For Adam's Car,
mm = \frac{Z}{3}
3
Z
∴ 3m = Z
For Harry's Car,
mm -− 1212 = \frac{Z}{0.75}
0.75
Z
mm -− 1212 = 4m4m
∴ m - 12 = 4m
∴ 3m = -12
∴ m = -4
But speed cam't be negative
∴ m = 4 km/h
∴ Speed of Adam's Car = m = 4 km/h
Answer:
4 km/h
Step-by-step explanation:
Distance b/w X and Y = Z km
Adam takes time = 3 hrs
Harry takes time = 45/60 = 0.75 hrs
Speed of Adam's Car = m
Speed of Harry's Car = m - 12
Speed = \frac{Distance}{Time}
Time
Distance
For Adam's Car,
mm = \frac{Z}{3}
3
Z
∴ 3m = Z
For Harry's Car,
mm -− 1212 = \frac{Z}{0.75}
0.75
Z
mm -− 1212 = 4m4m
∴ m - 12 = 4m
∴ 3m = -12
∴ m = -4
But speed can't be negative
∴ m = 4 km/h
∴ Speed of Adam's Car = m = 4 km/h