Is it right for a person to walk at a speed of 5m / s, a car of 40km / h and a bicycle of 5km / h

Is it right for a person to walk at a speed of 5m / s, a car of 40km / h and a bicycle of 5km / h

5m / S 1 hour = 60s 5 * 60 = 300, so it should be 300m / h or 0.3km/h, a bit slow

The car runs 360km in three hours. The ratio of the speed of the plane to that of mine is 3:20. How many kilometers does the plane travel per hour?

360 △ 3 / 20 in 3 hours = 2400km
So the plane travels 2400 △ 3 = 800 kilometers per hour
Comprehensive formula 360 △ 3 / 20 △ 3 = 800 km

The relationship between speed and time t is v = 20 / 1 + T km / h
seek
(1) When the speed of the car is reduced to 4km / h, the distance of the car is reduced;
(2) How long does it take for the car to complete the 10km journey

(1) When the vehicle speed decreases to 4km / h, 4 = 20 / 1 + T, t = 4
s=∫（0->4）vdt=20ln（1+t）（0->4）=20ln5
(2) The time required for the car to complete the 10km journey is t
20ln（1+t）=10
1+t=√e
t=√e-1

If the car runs on a straight road and the position of its speed pointer is shown in the figure, then the car's speed on the road is km / h, which is close to___ m/s
This shows that the distance of the car moving forward in 1 s is 0

No picture?
1m/s＝3.6km/h,
1km/h＝1/3.6(m/s)