If there are 200 questions in a 3 hr examination. Among these questions are 25 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 choice from the following answers:
A) 40 min B) 62 min C) 70 min D) 74 min E) 76 min
x=time for type B prolems   2x=time for type 40 min problem   total time=3hrs=180min   175x+25*2x=180   x=180/225= 
<gadget id="calculator">180/225</gadget>
<output>4/5 = around 0.8</output>
0.8   time taken for type 40 min problem=25*2*0.8= 
<gadget id="calculator">25*2*0.8</gadget>
<output>40</output>
40min   40 minNSWER:40 min
<result>A</result>
If there are 200 questions in a 3 hr examination. Among these questions are 25 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?