Speed / distance = time
6/2= 1/3 hour
1/3 x 60 = 20 minutes
15 minutes.
6mph
1.5 miles. Distance=rate*time, so if the time is .25 hours and the rate is 6mph, .25*6 is 1.5, your distance.
If she took 1 hour longer on her return trip, it means that she travelled...18 - 12 = 6 miles in 1 hourTherefore she was travelling at a speed of 6mph
6mph. 60/15 * 1.5 = 6.
Bert's actual speed would be 46mph, as you would add the speed of the tailwind to his traveling speed.
6mph
After three hours the first cyclist is 6 x 3 = 18 miles ahead. The speed of the second cyclict, when he starts, is 4mph relative to the first. So it will take him 18 miles/4mph = 4.5 hours to close the gap.
9 hours
about 6mph? 10 if your lucky
Her average speed is greater than her average velocity.
There's really no telling. There are too many different types of bikes and too many different types of riding. Most people stay above 6MPH and below 60MPH.