alleryएक यात्रा के तीन बराबर भागों को क्रमशः 20, 30 और 60 km/h की चाल से तय किया जाता है। पूरी यात्रा की औसत चाल क्या है?
A40 km/h
B35 km/h
C30 km/h
D25 km/h
Answer & Solution
Correct answer: C. 30 km/h
हरात्मक माध्य: 3 / (1/20 + 1/30 + 1/60) = 3 / (1/10) = 30 km/h.
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