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anastassius [24]
2 years ago
8

Castel left the science museum and traveled toward the mountains. Sumalee left one hour later traveling 10 km/h faster in an eff

ort to catch up to him. After two hours Sumalee finally caught up. What was Castel's average speed? Show your work.​
Mathematics
1 answer:
nadezda [96]2 years ago
3 0

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

<h3>Average speed</h3>

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

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Step-by-step explanation:

if the number of calls received during the first evening is X, then the number of calls received during the third evening is X+10 as the third evening received 10 more calls than first evening. The second evening received 4 times of third so 4X+10. Add them up together and put them equal to 110.

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