If there are 200 questions in a 3 hr examination. Among these questions are 100 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?  Choices
A) 72 min	B) 62 min	C) 70 min	D) 74 min	E) 120 min
x=time for type B prolems   2x=time for type A problem   total time=3hrs=180min   100x+100*2x=180   x=180/300= 
<gadget id="calculator">180/300</gadget>
<output>3/5 = around 0.6</output>
0.6   time taken for type A problem=100*2*0.6= 
<gadget id="calculator">100*2*0.6</gadget>
<output>120</output>
120min   ANSW120 minR:120 min
<result>E</result>
If there are 200 questions in a 3 hr examination. Among these questions are 100 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?