A man reaches his destination 40 minutes late if his speed is 3 km/hr, and reaches 30 minutes before time, if his speed is 4 km/hr. Find the distance of his destination from his starting point.यदि एक व्यक्ति की गति 3 km/hr है, तो वह अपने गंतव्य पर 40 मिनट की देरी से पहुँचता है, और यदि उसकी गति 4 km/hr है, तो वह समय से 30 मिनट पहले पहुँच जाता है। उसके प्रारंभिक बिंदु से गंतव्य की दूरी ज्ञात कीजिए।
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Correct answer: B. 14 km14 कि.मी.
Explanation
Difference in times = 40 + 30 = 70 min = 7/6 hr. So d/3 − d/4 = 7/6 ⇒ d/12 = 7/6 ⇒ d = 14 km.समयों का अंतर = 40 + 30 = 70 मिनट = 7/6 घंटा। अतः d/3 − d/4 = 7/6 ⇒ d/12 = 7/6 ⇒ d = 14 कि.मी.।More Mathematical Reasoning and Aptitude questions
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