ক গাড়ি চালায় ঘন্টায় ৪০ মাইল বেগে । খ গাড়ী চালায় ৩০ মাইল বেগে। তারা দুজনে একসাথে যাত্রা শুরু করে ৪৫০ মাইল দুরের গন্তব্যে যাওয়ার উদ্দেশ্য । খ ক এর কতক্ষন পর গন্তব্যে পৌছাবে?
A. ৪.১৫ ঘন্টা
B. ৩.৭৫ ঘন্টা
C. ২.৮৫ ঘন্টা
D. ৩.১৫ ঘন্টা
সঠিক উত্তরঃ
B.
৩.৭৫ ঘন্টা
Explanation:
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