Question

Castel left the science museum and traveled toward the mountains. Sumalee left one hour later traveling 10 km/h faster in an effort to catch up to him. After two hours Sumalee finally caught up. What was Castel's average speed? Show your work.​

Answer 1

Castel's average speed from the science museum to mountains is 20 km/h

Average speed

Let x represent Castel' average speed.

Sumalee left one hour later and caught up with Castel after two hours, Let us assume the distance covered is d:

For Castel:

• x = d / 3
• d = 3x  

For Sumalee:

• x + 10 = d / 2
• d = 2x + 20

3x = 2x + 20

x = 20 km/h

Therefore Castel's average speed from the science museum to mountains is 20 km/h

Find out more on average speed at: brainly.com/question/4931057