Question

. Rahul moves in a 2 km long road. He covers 4 km in 8 minutes by moving
from one end to the other and back along the same straight path. Find
the average speed and average velocity of Rahul.​

Answer 1

Explanation:

First 2km distance :

Speed v=30 km/h

Time taken t

1

=

30

2

=

15

1

h

Next 2km distance :

Speed v=20 km/h

Time taken t

2

=

20

2

=

10

1

h

Total time t=

15

1

+

10

1

=

6

1

Total distance =4 km

Average speed =

1/6

4

=24 km/h

Answer 2

Answer:

First 2km distance :

Speed v=30 km/h

Time taken t

1

=

30

2

=

15

1

h

Next 2km distance :

Speed v=20 km/h

Time taken t

2

=

20

2

=

10

1

h

Total time t=

15

1

+

10

1

=

6

1

Total distance =4 km

Average speed =

1/6

4

=24 km/h

Explanation:

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