A person travels from X to Y at a speed of 30 km/hr and returns from Y to X by increasing his speed by 50%. His average speed during the journey is:एक व्यक्ति 30 किमी/घंटा की गति से X से Y तक जाता है और अपनी गति 50% बढ़ाकर Y से X तक लौटता है। पूरी यात्रा में उसकी औसत गति क्या है?
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Correct answer: C. 36 km/hr36 किमी/घंटा
Explanation
Return speed = 30 × 1.5 = 45 km/hr. For equal distances, average speed = 2 × 30 × 45 / (30 + 45) = 2700/75 = 36 km/hr.वापसी की गति = 30 × 1.5 = 45 किमी/घंटा। समान दूरियों के लिए औसत गति = 2 × 30 × 45 / (30 + 45) = 2700/75 = 36 किमी/घंटा।More Mathematical Reasoning and Aptitude questions
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