alleryഒരു യാത്രയിൽ മൂന്ന് തുല്യ കാലുകൾ 20, 30, 60 km/h വേഗതയിൽ ഓടിക്കുന്നു. മുഴുവൻ യാത്രയുടെയും ശരാശരി വേഗത എത്രയാണ്?
A40 km/h
B35 km/h
C30 km/h
D25 km/h
Answer & Solution
Correct answer: C. 30 km/h
ഹാർമോണിക് ശരാശരി: 3 / (1/20 + 1/30 + 1/60) = 3 / (1/10) = 30 കി.മീ/മണിക്കൂർ.
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