alleryఒక ట్రక్కు వేగం 6 km/h తగ్గడం వల్ల 72 km మార్గంలో 1 గంట అదనపు సమయం తీసుకుంటుంది. దాని అసలు వేగం ఎంత?
A20 km/h
B24 km/h
C30 km/h
D36 km/h
Answer & Solution
Correct answer: B. 24 km/h
72/(s-6) - 72/s = 1 నుండి s(s-6) = 432 వస్తుంది, కాబట్టి s = 24 km/h.
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