The cyclist left point A at a speed of 18 km / h after 40 minutes, a car left at a speed of 54 km / h.
| January 27, 2021 | education
The cyclist left point A at a speed of 18 km / h after 40 minutes, a car left at a speed of 54 km / h. How long will it take for the car to catch up with the cyclist and at what distance will it happen?
We know the speeds of the bike and the car, the time after which the car left the road.
18t = 54 and also (t + 40).
We decide further.
From here we can identify:
18t – 54t = 2160.
Well, now we can understand that:
36t = 2160.
And from here we find t by a simple action.
t = 60.
Thus, we solved this problem correctly.
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