The car drove through the tunnel in 1 minute, moving at a speed of 60 km / h. How long would he pass this tunnel

The car drove through the tunnel in 1 minute, moving at a speed of 60 km / h. How long would he pass this tunnel, moving at a speed of 50 km / h

Let’s find the length of the tunnel, for this we multiply the speed by the time of movement, while expressing the time in hours:
1 minute = 1: 60 = 1/60 hour.
60 * 1/60 = 1 km.
Then, moving at a speed of 50 km / h, he will overcome the tunnel in:
1:50 = 1/50 hour = 6/5 min.
Answer: the required time is 6/5 minutes.