If a train runs at 40 kmph, it reaches its destination late by 11 minutes but if it runs at 50 kmph, it is late by 5 minutes only. The correct time for the trai

If a train runs at 40 kmph, it reaches its destination late by 11 minutes but if it runs at 50 kmph, it is late by 5 minutes only. The correct time for the train to complete its journey is :

If a train runs at 40 kmph, it reaches its destination late by 11 minutes but if it runs at 50 kmph, it is late by 5 minutes only. The correct time for the train to complete its journey is : ?

Created: 1 week ago | Updated: 1 week ago | Created By:

Imran Ahmed

13 minutes

15 minutes

19 minutes

21 minutes

0 1

Best Answer Explained in Below-:

Hints: উভয় ক্ষেত্রেই train টি একই দূরত্ব অতিক্রম করে। তখন বেগ kmph এ দেওয়া কিন্তু সময় দেওয়া মিনিটে। এই kmph এর মানকে 60 দ্বারা ভাগ করে মিনিটে নিতে হবে। ধরি, original time t. প্রথম ক্ষেত্রে দূরুত্ব = বেগ × সময় = 40 /60 (t + 11) দ্বিতীয় ক্ষেত্রে, দুরুত্ব = 50/60 (a + 5) এখন, 40/60(t + 11) = 50/60 (t + 5) t = 19 minutes

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