Question

1. If a bicycle travels a distance of 480km in 4h at a uniform speed. Express its speed in km/h and m/s.

2. If a ship travels at a speed of 930km/h. Express its speed in m/s.

3. If a plane travels at a speed of 620m/s. i. How for will the plane travel in 30s. ii. Express its speed in km/h.​

Answer 1

Answer:

1) 120 km/h, 33.33 m/s, 2) 258.33 m/s, 3) 18600 metres, 2232 km/h.

Explanation:

1) Distance travelled in 1 hour = (480/4) km/h

= 120 km/h.

To convert km/h to m/s, multiply by 5/18.

120×5/18 = 33.33 m/s.

2) 930×5/18 = 258.33 m/s.

3) Distance= Speed ×time

620×30= 18600 metres

To convert m/s to km/h, multiply by 18/5.

620×18/5= 2232 km/h.