If there are 200 questions in a 3 hr examination. Among these questions are 50 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 correct option
A) 72 min B) 62 min C) 70 min D) 74 min E) 76 min
x=time for type B prolems   2x=time for type 72 min problem   total time=3hrs=180min   150x+50*2x=180   x=180/250= 
<gadget id="calculator">180/250</gadget>
<output>18/25 = around 0.72</output>
0.72   time taken for type 72 min problem=50*2*0.72= 
<gadget id="calculator">50*2*0.72</gadget>
<output>72</output>
72min   72 minNSWER:72 min
<result>A</result>
If there are 200 questions in a 3 hr examination. Among these questions are 50 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?