Subject
Quantitative Aptitude
Topic
Speed & Distance
Mr. X and Mr. Y started from point A and reached point B in 10 minutes and 9 minutes respectively. If the traveling speed of Mr. X was 2 km/hr less than that of Mr. Y, what was the distance between A and B in kms?
Mr. X and Mr. Y started from point A and reached point B in 10 minutes and 9 minutes respectively. If the traveling speed of Mr. X was 2 km/hr less than that of Mr. Y, what was the distance between A and B in kms?
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3ঙ)
none of theseExplanation
QUESTION : Mr. X এবং Mr. Y point A থেকে যাত্রা শুরু করে যথাক্রমে 10 মিনিট এবং 9 মিনিটে point B-তে পৌঁছান। যদি Mr. X-এর ভ্রমণের গতি Mr. Y-এর থেকে 2 km/hr কম হয়, তাহলে A এবং B-এর মধ্যে দূরত্ব কত km? সমাধান: *চলক নির্ধারণ: -ধরি, Mr. Y-এর গতি x km/hr -তাহলে, Mr. X-এর গতি (x-2) km/hr -A এবং B-এর মধ্যে দূরত্ব d km *সমীকরণ স্থাপন: -Mr. X-এর জন্য: d / (x-2) = 10/60 -Mr. Y-এর জন্য: d / x = 9/60 *সমীকরণ সমাধান: সমীকরণ থেকে পাই: -60d / (x-2) = 10 -60d / x = 9 এই সমীকরণগুলি ভাগ করে: -(60d / (x-2)) / (60d / x) = 10/9 -x / (x-2) = 10/9 -9x = 10x - 20 -x = 20 km/hr সুতরাং, Mr. Y-এর গতি 20 km/hr এবং Mr. X-এর গতি 18 km/hr *দূরত্ব নির্ণয়: -যেকোনো একটি সমীকরণ ব্যবহার করে: -d = 20 * 9/60 = 3 km সঠিক উত্তর হল (D) 3 km।Related questions
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