It takes Karim an hour to do a job that Rahim can do in 40 minutes. One morning they worked together for 12 minutes; then Karim went away and Rahim finished the job. How long did it take him to finish?
A 8 min.
B 16 min.
C 20 min.
D 28 min.
Solution
Correct Answer: Option C
অ্যাপ/ওয়েবসাইটে রুটিনভিত্তিক নিয়মিত লাইভ পরীক্ষা হচ্ছে।