The speeds of pedestrian, cyclist and motorcyclist are in the ratio: 1: 3: 15.
| August 2, 2021 | education
The speeds of pedestrian, cyclist and motorcyclist are in the ratio: 1: 3: 15. Find the speed of the cyclist if it is less than the speed of the motorcycle by 48 km / h.
The lowest speed is for a pedestrian, so in relation it is recorded as 1.
Determine how many equal parts the speed of the cyclist is lower than the speed of the motorcyclist.
15 – 3 = 12.
We find the speed of the pedestrian.
To do this, we divide the difference in speed of a cyclist and a motorcyclist by the difference in parts.
48/12 = 4 km / h.
From this it follows that the speed of the cyclist is equal to:
4 * 3 = 12 km / h.
The rider’s speed will be:
4 * 15 = 60 km / h.
Answer: The speed of the cyclist is 12 km / h.
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