Question

Abdul while driving to school computes the average speed for his trip to be 20 kilometre hour on his return trip along the same route there is less traffic and average speed is 30 kilometre per hour what is the average speed for Abdul trip ??​

Answer 1

Answer:

Answer. ∴ Average speed for forward journey[home - school ] = Total distance/ Total time. Average speed for backward journey[school -home] = Total distance/ Total time. ∴ The average speed for Abdul's trip is 24km/h.

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Answer 2

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

see the attachment