Question

Abdul while driving to school

Answer 1

Answer:

computes the average speed for his trip to be 20 km h–1. On his return trip along the same route, there is less traffic and the average speed is 30 km h–1

Explanation:

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