Question

A person moves from point A to point B which is at a distance of 10 km and returns to the same point A after an hour. The average velocity for motion is
pls answer asap ...

Answer 1

Explanation:

Correct option is

A

4

17

km/h and

4

13

km/h

Given AB=12 km(s

1

) and BC=5 km(s

2

)

Speed from A to B =4 km/h

Time taken t

1

=

4

12

=3 hr

Speed from B to C =5 km/h

Time taken to complete distance from B to C, t

2

=

5

5

=1 hr

Average speed =

t

1

+t

2

s

1

+s

2

=

3+1

12+5

=

4

17

km/h

AC=

(AB)

2

+(BC)

2

=

144+25

=

169

=13 km

Average velocity =

4

13

km/h