alleryએક વાહન 10 km રસ્તાનું બે પંચમાંશ અંતર 20 km/h ની ઝડપે અને બાકીનું અંતર 30 km/h ની ઝડપે કાપે છે. સરેરાશ ઝડપ કેટલી?
A25 km/h
B26 km/h
C28 km/h
D24 km/h
Answer & Solution
Correct answer: A. 25 km/h
20 ની ઝડપે 4 km માં 0.2 કલાક અને 30 ની ઝડપે 6 km માં 0.2 કલાક લાગે છે, તેથી 0.4 કલાકમાં 10 km એટલે 25 km/h થાય.
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