alleryएक वाहन 10 km लंबी सड़क का दो-पाँचवाँ भाग 20 km/h की चाल से और शेष भाग 30 km/h की चाल से तय करता है। औसत चाल क्या है?
A25 km/h
B26 km/h
C28 km/h
D24 km/h
Answer & Solution
Correct answer: A. 25 km/h
20 km/h की चाल से 4 km में 0.2 घंटे और 30 km/h की चाल से 6 km में 0.2 घंटे लगते हैं, इसलिए 0.4 घंटे में 10 km तय करने पर औसत चाल 25 km/h होगी।
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