1) There is a relationship between speed, distance and time:

Speed = Distance / Time OR

Distance = Speed* Time

2) Average Speed = 2xy / x+y

where x km/hr is a speed for certain distance and y km/hr is a speed at for same distance covered.

Note: Average speed is not just an average of two speeds i.e. x+y/2. It is equal to 2xy / x+y

3) Always remember that during solving questions units must be same. Units can be km/hr, m/sec etc.

Note: Conversion of km/ hr to m/ sec and m/ sec to km/ hr

x km/ hr = (x* 5/18) m/sec i.e. u just need to multiply 5/18

Similarly, x m/sec = (x*18/5) km/sec

4) Speed = Distance/ Time.

Now, if in questions Distance is constant then speed will be inversely proportional to time i.e. if speed increases ,time taken will decrease and vice versa.

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Question 1 of 15

1. Question

A car is travelling at an average speed of 45kmph for the 1st hour and at 65 kmph for the next 1 hour. Calculate his average speed.

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Question 2 of 15

2. Question

What is the distance covered by a car travelling at a speed of 40 kmph in 15 minutes?

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Question 3 of 15

3. Question

A man goes to his office from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming, what is the distance between his house and office?

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Question 4 of 15

4. Question

“A” rides his bicycle 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. What is his average speed for the entire trip

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Question 5 of 15

5. Question

A car covers a distance of 624 km in 6 ½ hours. Find its speed?

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Question 6 of 15

6. Question

In what time will a railway train 60 m long moving at the rate of 36 kmph pass a telegraph post on its way?

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Question 7 of 15

7. Question

If a train, travelling at a speed of 90 kmph, crosses a pole in 5 sec, then the length of train is?

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Question 8 of 15

8. Question

How many seconds will a train 100 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph?

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Question 9 of 15

9. Question

The distance between Chennai and Vellore is 110 kms. A starts from Chennai with a speed of 20 kmph at 7 a.m. for Vellore and B starts from Vellore with a speed of 25 kmph at 8 p.m. from Chennai . When will they meet?

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Question 10 of 15

10. Question

“A” walked from his home to the bank at the rate of 20 km/h and returned back at the rate of 5 km/h. If he took 4 hours and 30 minutes for the whole journey, find the distance of the bank from his home

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Question 11 of 15

11. Question

Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?

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Question 12 of 15

12. Question

The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:

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Question 13 of 15

13. Question

A train leaves from a station and moves at a certain speed. After 2 hours, another train leaves from the same station and moves in the same direction at a speed of 60 mph. If it catches up with the first train in 4 hours, what is the speed of the first train?

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Question 14 of 15

14. Question

How long will a boy take to run round a square field of side 35 meters, If he runs at the rate of 9 km/hr?

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Question 15 of 15

15. Question

Moving at 50 kmph, a person reaches his office 10 min late. Next day, he increases his speed and moves at 60 kmph and reaches his office 5 min early. What is the distance from his home to his office?