Subject
Govt.Jobs
Topic
বিসিআইসি (সহকারী ব্যাবস্থাপকঃ প্রশাসন) - ১৩.০৫.২০২২
Jack travelled from home to office at an average rate of 40 km/hour .Then he drove back home from office at an average rate of 60 km /hour .If he spent a total of 2 hours in travelling and he took the same road each way,what is the total distance (in km) that Jack travelled?
Jack travelled from home to office at an average rate of 40 km/hour .Then he drove back home from office at an average rate of 60 km /hour .If he spent a total of 2 hours in travelling and he took the same road each way,what is the total distance (in km) that Jack travelled?
ক)
48খ)
60গ)
96ঘ)
108Explanation
মনে করি, বাড়ি থেকে অফিসের দূরত্ব =x km অতএব , গড় বেগ =মোট দূরত্ব /মোট সময় =(x+x)/ x/40 +x/60 =2x/ {(3x+2x)/12} =2x/(5x/120) =2x ×(120/5x) =48 km/h অতএব ,মোট দূরত্ব =2×48 =96 kmRelated questions
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