Two friends start moving towards each other from points 100 km apart at speeds of 20 km/h and 30 km/h. How long before they meet?

A1.5 hours

B2 hours

C2.5 hours

D3 hours

Explanation

Relative speed = 20 + 30 = 50 km/h. Time to meet = 100 / 50 = 2 hours.

Exam Relevance

Topic: Age Problems, Time & Distance, Work
Subtopic: Relative Speed

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