Question

the average speed of a person in driving to school is 30 km / h . On the return along a straight route the average speed was 25 km / h . What is the average speed for the whole route from the school
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Answer 1

Answer:

Let us assume that Abdul is travelling x kilometer distance while going to school.

Distance = Speed x Time

1)When it's average speed is 20 km/hr

x=v

1

×t

1

=20×t

1

2)When it's average speed is 30 km/hr

x=v

2

×t

2

=30×t

2

V

average

=

totaltimetaken

totaldistancetravelled

V

average

=

v

1

x

+

v

2

x

x+x

=

20

x

+

30

x

2x

=24 km h

−1