alleryएका प्रवासाचे तीन समान टप्पे 20, 30 आणि 60 km/h वेगाने पार केले जातात. संपूर्ण प्रवासाचा सरासरी वेग किती आहे?
A40 km/h
B35 km/h
C30 km/h
D25 km/h
Answer & Solution
Correct answer: C. 30 km/h
संवादी सरासरी (Harmonic mean): 3 / (1/20 + 1/30 + 1/60) = 3 / (1/10) = 30 km/h.
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