6. A car travels a distance of 200 km in 5 hr. Calculate its aver into m/s. 7. The train A' travelled a distance of 120 km in 3 hours whereas another train 'B travelled distance of 180 km in 4 hours. Which train goes faster? 8. What is a distance-time man
Answers
Questions :
6. A car travels a distance of 200 km in 5 hr. Calculate its speed into m/s.
7. The train A' travelled a distance of 120 km in 3 hours whereas another train 'B travelled distance of 180 km in 4 hours. Which train goes faster?
8. What is a distance-time man ?
Solutions :
6) Distance travelled by the car in 5 hr = 200 km
- Speed = Distance/Time
- Speed = 200/5 km/h → 40 km/h
Converting into m/sec we get
1 km/h = 5/18 m/sec
40 km/h = 40 × 5/18 m/sec → 11.11 m//sec
So the speed is 11.11 m/sec
7) Train A travelled 120 km in 3 hrs
We know that :
Speed = Distance/Time
Speed = 120/3
Speed = 40 km/h
∴ Train A travels at a speed of 40 km/h
Train B travelled 180 km in 4 hrs
Formula :
Speed = D/T
Speed = 180/4
Speed = 45 km/h
∴ Train B travels at a speed of 45 km/h
By comparing both the speeds we get to know that Train B travelled faster
8) Distance = Speed x Time
For a certain distance, if the ratio of speeds is x : y, then the ratio of times taken to cover the distance would be y : x and vice versa.