Question

Abdul, while driving to school, 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. What is the average speed for Abdul’s trip?​

Answer 1

Answer:

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

Distance = Speed x Time

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=v¹×t¹ =20×t¹

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

x=v² ×t²=30×t²

V

average = total time taken/total distance travelled

V

average = x+x÷x/v¹+x/v² = 2x÷x/20+x/30

= 24km h-¹

answer= 24km h-¹

Answer 2

Answer:

Given - u = 20 km/hr.

v = 30 km/hr.

Explaination:

Average speed = v - u/t

= 30 - 20 /2 km/hr

= 10 / 2 km/hr

= 5 km/hr.