allery100 किमी की यात्रा में पहले 60 किमी 30 किमी/घंटा की चाल से और शेष 40 किमी 20 किमी/घंटा की चाल से तय किए जाते हैं। औसत चाल क्या है?
A24 किमी/घंटा
B26 किमी/घंटा
C25 किमी/घंटा
D28 किमी/घंटा
Answer & Solution
Correct answer: C. 25 किमी/घंटा
दोनों भागों में लगने वाला समय क्रमशः 2 घंटे और 2 घंटे है, अतः 4 घंटे में 100 किमी तय करने पर औसत चाल 100 / 4 = 25 किमी/घंटा होगी।
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