Puzzles on ch 12 Idea of Speed, Distance and Time

Puzzles on Speed, Distance, and Time

1. A train 180 meters long passes a pole in 9 seconds. What is its speed?

Hint: Speed = Distance / Time.

Answer: 20 m/s.

2. A train passes a platform of 150 meters in 12 seconds. If the train's speed is 60 km/h, what is the train's length?

Hint: Total distance = Train length + Platform length.

Answer: 50 meters.

3. A car travels 120 km in 2 hours. What is its speed in m/s?

Hint: Convert km/h to m/s using 1 km/h = 5/18 m/s.

Answer: 16.67 m/s.

4. A cyclist travels at 20 km/h for 45 minutes. How far does he travel?

Hint: Time must be in hours.

Answer: 15 km.

5. A train of length 200 meters passes a pole in 10 seconds. What is its speed in km/h?

Hint: Convert m/s to km/h using 1 m/s = 3.6 km/h.

Answer: 72 km/h.

6. A bus travels 90 km in 1.5 hours. What is its speed in km/h?

Hint: Speed = Distance / Time.

Answer: 60 km/h.

7. A train running at 72 km/h crosses a platform of length 300 meters in 25 seconds. What is the length of the train?

Hint: Total distance = Speed × Time.

Answer: 200 meters.

8. A train 300 meters long passes a platform in 30 seconds. Its speed is 54 km/h. What is the platform length?

Hint: Platform length = Total distance - Train length.

Answer: 150 meters.

9. A car covers 240 km in 4 hours. What is its speed in m/s?

Hint: Convert km/h to m/s using 1 km/h = 5/18 m/s.

Answer: 16.67 m/s.

10. A train of length 150 meters passes a pole in 6 seconds. What is its speed in m/s?

Hint: Speed = Distance / Time.

Answer: 25 m/s.