A delivery car went from Candleford to Lark Rise and back at an average speed of23 miles per hour. If the distance from Candleford to Lark Rise is 1 mile, and the trip back too half as much time as the trip there, what was the average speed of the delivery car on the way to Lark Rise?

A 13
B 34
C 12
D 23

Correct Answer: 12

প্রশ্নে বলা হচ্ছে, একটি গাড়ি ক্যান্ডেলফোর্ড থেকে লার্ক রাইজে যেয়ে পুনরায় ক্যান্ডেলফোর্ডে ফিরে আসে। এসময় গড় বেগ ছিল = 23 mph. ক্যান্ডেলফোর্ড হতে লার্ক 3 রাইজের দূরত্ব 1 মাইল এবং গাড়িটি যে সময়ে লার্ক রাইজে গিয়েছিল তার অর্ধেক সময়ে ক্যান্ডেলফোর্ডে ফিরে এলে লার্ক রাইজে যাবার সময় গড় বেগ কত ছিল? ফিরে আসার গড় বেগ ছিল 23mph. যার অর্থ 2 মাইল অতিক্রম করে 3 ঘণ্টায়। এখন ধরি, লার্ক রাইজে যেতে সময় লাগে 2 ঘণ্টা । .:. ফিরে আসতে সময় লেগেছিল 1 ঘণ্টা অর্থাৎ গাড়িটি 1 মাইল দূরত্ব যেতে 2 ঘণ্টা সময় নিয়েছিল .:. নির্ণেয় বেগ = 12mph.
Bissoy MCQ
#পিএসসি ও অন্যান্য নিয়োগ পরীক্ষা #গণিত #গড় (Average) #বাংলাদেশ পেট্রোলিয়াম ইনস্টিটিউট (সহকারী পরিচালক) 18-12-2020

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