If there are 200 questions in a 3 hr examination. Among these questions are 20 type A problems, which requires twice as much as time be spent than the rest of the type B problems. How many minutes should be spent on type A problems? Choose the most appropriate option
A) 72 min B) 62 min C) 70 min D) 32.72727 min E) 76 min
x=time for type B prolems   2x=time for type A problem   total time=3hrs=180min   180x+20*2x=180   x=180/220   x=0.818182   time taken for type A problem=20*2*0.818182=32.72727min   ANSWER:32.72727 min
<result>D</result>
If there are 200 questions in a 3 hr examination. Among these questions are 20 type A problems, which requires twice as much as time be spent than the rest of the type B problems. How many minutes should be spent on type A problems?