The following question is accompanied by two statements (I) and (II). You have to determine which statements(s) is/are sufficient/necessary to answer the questions. How much time train A will take to cover a distance of 266 km? Statement I. The ratio of speed at which train A and train B run is 4 : 5 respectively. Statement II. The average speed of train A and train B is 400 / 9 km / h.
Created: 28 Feb 2026 |
Updated: 28 Feb 2026
Updated: 28 Feb 2026
Explanation:
The following question is accompanied by two statements (I) and (II). You have to determine which statements(s) is/are sufficient/necessary to answer the questions. How much time train A will take to cover a distance of 266 km? Statement I. The ratio of speed at which train A and train B run is 4 : 5 respectively. Statement II. The average speed of train A and train B is 400 / 9 km / h. Correct Answer The data in both statements I and II together are necessary to answer the question. Given: Distance covered by train A = 266 km Calculation: From statement I: The ratio of speed is given A : B = 4 : 5 But can not find the individual speed. ∴ Statement I alone is not sufficient. From Statement II: The average speed of both trains is given so we can’t find the individual speed. ∴ Statement II alone is not sufficient. Combining both statements: We get A’s speed = 40 km / h and B’s speed is 50 km / h. ∴ Statement I and II both are necessary.
বাংলা সাহিত্য ও ব্যাকরণ হলো বাংলা ভাষার দুটি অবিচ্ছেদ্য অঙ্গ। বাংলা সাহিত্য হলো বাংলা ভাষায় রচিত কবিতা, উপন্যাস, নাটক, গল্পসহ সৃজনশীল ও মননশীল রচনার সমষ্টি, যার সূচনা দশম শতাব্দীতে 'চর্যাপদ' এর মাধ্যমে। অন্যদিকে, বাংলা ব্যাকরণ হলো এমন একটি শাস্ত্র বা বিজ্ঞান, যা বাংলা ভাষার গঠন, প্রকৃতি, ধ্বনি, শব্দ ও বাক্যের নিয়ম-কানুন বিশ্লেষণ করে ভাষার শুদ্ধ রূপ ও প্রয়োগ শেখায়।
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