Question

A car travels from point A to B in 3 hours and written back to point a in 5 hours. Point A and B are 150 miles apart along a straight highway then calculate
1. Speed and velocity when it travel from A to B
2. Speed and velocity when a travel back B to A
3. Speed and velocity when it travel and returns
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Answer 1

Step-by-step explanation:

As the car finally reaches at its initial position again, thus net displacement of the car is zero   i.e  S=0  km

Total time taken         t=4+6=10 h

∴  Average velocity       vavg=tS=100=0  km/h

Answer 2

Answer:

Correct option is

B

24kmh

−1

Let distance from A to B be x

Time for travel from A to B= x/20

Time for travel from B to A= x/30

Hence,speed for total distance 2x is:

30

x

+

20

x

2x

=

5x

2x×60

=24 km\hr