A man travelled a distance of 80 km in 7 hours, partly on foot at the rate of 8 km/hour and partly on bicycle at 16 km/hour, then the distance travelled on foot is :एक आदमी 80 किमी दूरी को 7 घन्टे में तय करता है, वह आंशिक दूरी 8 किमी/घन्टे की दर से पैदल चल कर तथा 16 किमी/घन्टे की दर से आंशिक दूरी साइकिल से तय करता है, तो वह पैदल कितनी दूरी चलता है ?
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Correct answer: C. 32 km32 किमी
Explanation
Let the distance on foot be x km. Then x/8 + (80 − x)/16 = 7, so 2x + 80 − x = 112, which gives x = 32. The man walks 32 km.माना पैदल दूरी x किमी है। तब x/8 + (80 − x)/16 = 7, अर्थात् 2x + 80 − x = 112, अतः x = 32। वह 32 किमी पैदल चलता है।More Mathematics & Numerical Ability questions
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